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  1. Article: Unerwünschtes Verhalten von Hunden beim Autofahren – Prophylaxe und Therapie

    Döring-Schätzl, Dorothea / Erhard, M. H.

    Tierärztliche Praxis K: Kleintiere/Heimtiere

    2004  Volume 32, Issue 03, Page(s) 170–174

    Abstract: Verhaltensprobleme von Hunden beim Autofahren können sich in übermäßiger Vokalisation (Bellen, Jaulen), Unruhe und Stressreaktionen wie Zittern, Hecheln, Salivation usw. äußern. Als Ursache kommt Angst durch mangelnde oder schlechte Erfahrungen mit dem ... ...

    Abstract Verhaltensprobleme von Hunden beim Autofahren können sich in übermäßiger Vokalisation (Bellen, Jaulen), Unruhe und Stressreaktionen wie Zittern, Hecheln, Salivation usw. äußern. Als Ursache kommt Angst durch mangelnde oder schlechte Erfahrungen mit dem Autofahren in Betracht. Unruhe und Vokalisation im Auto können auch aufgrund der vielen und schnell wechselnden optischen und akustischen Reize, bei »freudiger Erregung« eines unausgelasteten Hundes oder in Zusammenhang mit territorialem Verhalten auftreten. Häufig wird das Verhaltensproblem durch das falsche Verhalten der Besitzer gefördert, z. B. durch deren Versuche, den Hund zu beruhigen, oder durch Schimpfen. Die beste Prophylaxe von Verhaltensproblemen ist das frühe und behutsame Gewöhnen von Welpen in der »sensiblen Phase« der Entwicklung (in den ersten drei Lebensmonaten) an das Autofahren. Besteht bei einem Hund ein Verhaltensproblem, muss es nach sorgfältiger Diagnosestellung ursächlich behandelt werden. Mithilfe eines Gewöhnungstrainings in kleinen Schritten (systematische Desensibilisierung) wird der Hund an die Situation des Autofahrens gewöhnt und unter Einsatz von Belohnungen wird ihm ein erwünschtes Alternativverhalten antrainiert. Es ist zu beachten, dass es sich bei jedem Verhaltensproblem um einen ganz individuellen Einzelfall handelt, der sorgfältig analysiert und therapiert werden muss.

    Dogs transported in cars may show behaviour problems like vocalisation (barking, howling), restlessness or displaying signs of distress like trembling, panting or salivation. A possible reason may be fear induced by insufficient or bad experiences with driving. Restlessness and vocalisation in the car may also occur due to multiple and rapid changes in optical and acoustical stimuli. Other reasons can be excitement of an unbalanced dog or barking in context of territorial behaviour. Often the behaviour problem is supported by the wrong reaction of the owner trying to calm the dog or scolding it. The best prophylaxis of behaviour problems is the early and gentle habituation of puppies in their »sensitive period« of ontogenesis (up to the age of three months) to driving by car. If a problem already exists, careful diagnosis and causal treatment are necessary. A stepwise training program (systematic desensitization) can get the dog used to the situation of driving. It will learn a desired alternative behaviour by earning a reward. It must be considered that every behavioural problem is an individual case that must be analyzed and treated carefully.
    Keywords Hund ; Autofahren ; unerwünschtes Verhalten ; Angst ; Bellen ; Desensibilisierung ; Verhaltenstherapie ; Dog ; Car driving ; Undesirable behaviour ; Fear ; Barking ; Desensitization ; Behavioural therapy
    Language German
    Publishing date 2004-03-01
    Publisher Schattauer GmbH
    Publishing place Stuttgart ; New York
    Document type Article
    ISSN 2567-5842 ; 1434-1239
    ISSN (online) 2567-5842
    ISSN 1434-1239
    DOI 10.1055/s-0037-1622409
    Database Thieme publisher's database

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  2. Article: Das tierärztliche Gemeinschaftsprojekt »Hundeführerschein – Grundwissen Gefahrenvermeidung im Umgang mit Hunden«

    Döring-Schätzl, Dorothea / Geppert, Pia / Falbesaner, Ulrike / Jung, Hildegard / Mantel, Th. / Erhard, M. H.

    Tierärztliche Praxis K: Kleintiere/Heimtiere

    2004  Volume 32, Issue 05, Page(s) 300–306

    Abstract: Verletzungen durch Hunde entstehen häufig dadurch, dass den Besitzern wichtige Kenntnisse zum Verhalten ihrer Tiere fehlen. Unkontrolliertes Verhalten wie Anspringen etc., Jagdverhalten und aggressives Verhalten können ernst zu nehmende Gefährdungen ... ...

    Abstract Verletzungen durch Hunde entstehen häufig dadurch, dass den Besitzern wichtige Kenntnisse zum Verhalten ihrer Tiere fehlen. Unkontrolliertes Verhalten wie Anspringen etc., Jagdverhalten und aggressives Verhalten können ernst zu nehmende Gefährdungen darstellen. Die Erfahrungen aus der verhaltenstherapeutischen Sprechstunde des Institutes sowie die Ergebnisse von Untersuchungen zeigen, dass viele Hundehalter Gefahrensituationen nicht rechtzeitig erkennen und falsch reagieren, wenn sich ihr Hund aggressiv verhält. Dadurch kann die Situation gefährlich eskalieren, außerdem wird das Problemverhalten des Tieres meist noch unabsichtlich durch die Reaktion der Halter verstärkt. Viele Bissverletzungen hätten sich vermeiden lassen, hätte man rechtzeitig das Problem erkannt, ihm vorgebeugt und in der kritischen Situation richtig reagiert. Um Gefahren durch Hunde zu vermeiden, haben die Bayerische Landestierärztekammer, der »Arbeitskreis Hundeführerschein« sowie das Institut für Tierschutz, Verhaltenskunde und Tierhygiene der Tierärztlichen Fakultät der Ludwig-Maximilians-Universität München das tierärztliche Gemeinschaftsprojekt »Hundeführerschein, Grundwissen Gefahrenvermeidung im Umgang mit Hunden« entwickelt. In einem zwölfstündigen Theoriekurs mit praktischen Elementen, anhand von Videos und konkreten Beispielen, wird Hundehaltern durch Tierärzte das Grundwissen im Umgang mit Hunden und zur Gefahrenvermeidung vermit-telt. Um diese Kurse durchführen zu können, wurden bereits 445 Tierärzte von den oben genannten Institutionen in fünf Seminaren geschult. Diese Tierärzte wiederum haben seit Herbst 2001 ca. 170 »Hundeführerschein«-Kurse für Hundehalter mit ca. 1700 Teilnehmern in Bayern durchgeführt. Die Rückmeldungen sowohl der Kursleiter als auch der Kursteilnehmer zeigen – dass die Kurse und der Wissensgewinn als sehr positiv bewertet werden.

    Often, dogs bite because owners are lacking basic knowledge of dog response. Aggressive and hunting behaviour, jumping up at people etc. can be serious dangers. As experiences from the Institute’s behaviour practice and results from scientific studies show, many dog owners do not recognize dangerous situations in time and may react inappropriately when their dogs behave aggressively, causing such situations to escalate. Often owners unconsciously reinforce the behaviour problem of their dogs with their reaction. Many dog-bites can be avoided when the owner detects and prevents the problem in time and reacts adequately in critical situations. Hence, the Bavarian Veterinary Chamber, the special interest group “Dog keeping licence” and the Institute for Animal Welfare, Animal Behaviour and Animal Hygiene (University of Munich) developed the veterinarian project “Dog keeping licence – basics in avoiding dangerous situations with dogs” (“Hundeführerschein”). Trained veterinarians teach dog owners the basic knowledge of dealing with dogs and risk prevention. This course consists of twelve hours teaching including practical elements, concrete examples, videos etc. To conduct these courses, 445 veterinarians have been taught by the above institutions in five seminars. In turn, they have held more than 170 courses for dog owners with 1700 participants since autumn 2001. Assessments of the courses and the acquired knowledge by the teachers and participants have given a positive and very encouraging feedback.
    Keywords Hundeführerschein ; Hundeverhalten ; Gefahrenvermeidung ; Gefährlichkeit ; Aggression ; Hundebisse ; Dog keeping licence ; Dog behaviour ; Risk prevention ; Dangerousness ; Aggression ; Dog-bites
    Language German
    Publishing date 2004-05-01
    Publisher Schattauer GmbH
    Publishing place Stuttgart ; New York
    Document type Article
    ISSN 2567-5842 ; 1434-1239
    ISSN (online) 2567-5842
    ISSN 1434-1239
    DOI 10.1055/s-0037-1622432
    Database Thieme publisher's database

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  3. Article ; Online: Point Absorber Limits to Future Gravitational-Wave Detectors.

    Jia, Wenxuan / Yamamoto, Hiroaki / Kuns, Kevin / Effler, Anamaria / Evans, Matthew / Fritschel, Peter / Abbott, R / Adams, C / Adhikari, R X / Ananyeva, A / Appert, S / Arai, K / Areeda, J S / Asali, Y / Aston, S M / Austin, C / Baer, A M / Ball, M / Ballmer, S W /
    Banagiri, S / Barker, D / Barsotti, L / Bartlett, J / Berger, B K / Betzwieser, J / Bhattacharjee, D / Billingsley, G / Biscans, S / Blair, C D / Blair, R M / Bode, N / Booker, P / Bork, R / Bramley, A / Brooks, A F / Brown, D D / Buikema, A / Cahillane, C / Cannon, K C / Chen, X / Ciobanu, A A / Clara, F / Compton, C M / Cooper, S J / Corley, K R / Countryman, S T / Covas, P B / Coyne, D C / Datrier, L E H / Davis, D / Di Fronzo, C / Dooley, K L / Driggers, J C / Dupej, P / Dwyer, S E / Etzel, T / Evans, T M / Feicht, J / Fernandez-Galiana, A / Frolov, V V / Fulda, P / Fyffe, M / Giaime, J A / Giardina, K D / Godwin, P / Goetz, E / Gras, S / Gray, C / Gray, R / Green, A C / Gustafson, E K / Gustafson, R / Hall, E D / Hanks, J / Hanson, J / Hardwick, T / Hasskew, R K / Heintze, M C / Helmling-Cornell, A F / Holland, N A / Jones, J D / Kandhasamy, S / Karki, S / Kasprzack, M / Kawabe, K / Kijbunchoo, N / King, P J / Kissel, J S / Kumar, Rahul / Landry, M / Lane, B B / Lantz, B / Laxen, M / Lecoeuche, Y K / Leviton, J / Liu, J / Lormand, M / Lundgren, A P / Macas, R / MacInnis, M / Macleod, D M / Mansell, G L / Márka, S / Márka, Z / Martynov, D V / Mason, K / Massinger, T J / Matichard, F / Mavalvala, N / McCarthy, R / McClelland, D E / McCormick, S / McCuller, L / McIver, J / McRae, T / Mendell, G / Merfeld, K / Merilh, E L / Meylahn, F / Mistry, T / Mittleman, R / Moreno, G / Mow-Lowry, C M / Mozzon, S / Mullavey, A / Nelson, T J N / Nguyen, P / Nuttall, L K / Oberling, J / Oram, Richard J / Osthelder, C / Ottaway, D J / Overmier, H / Palamos, J R / Parker, W / Payne, E / Pele, A / Penhorwood, R / Perez, C J / Pirello, M / Radkins, H / Ramirez, K E / Richardson, J W / Riles, K / Robertson, N A / Rollins, J G / Romel, C L / Romie, J H / Ross, M P / Ryan, K / Sadecki, T / Sanchez, E J / Sanchez, L E / Saravanan, T R / Savage, R L / Schaetzl, D / Schnabel, R / Schofield, R M S / Schwartz, E / Sellers, D / Shaffer, T / Sigg, D / Slagmolen, B J J / Smith, J R / Soni, S / Sorazu, B / Spencer, A P / Strain, K A / Sun, L / Szczepańczyk, M J / Thomas, M / Thomas, P / Thorne, K A / Toland, K / Torrie, C I / Traylor, G / Tse, M / Urban, A L / Vajente, G / Valdes, G / Vander-Hyde, D C / Veitch, P J / Venkateswara, K / Venugopalan, G / Viets, A D / Vo, T / Vorvick, C / Wade, M / Ward, R L / Warner, J / Weaver, B / Weiss, R / Whittle, C / Willke, B / Wipf, C C / Xiao, L / Yu, Hang / Yu, Haocun / Zhang, L / Zucker, M E / Zweizig, J

    Physical review letters

    2021  Volume 127, Issue 24, Page(s) 241102

    Abstract: High-quality optical resonant cavities require low optical loss, typically on the scale of parts per million. However, unintended micron-scale contaminants on the resonator mirrors that absorb the light circulating in the cavity can deform the surface ... ...

    Abstract High-quality optical resonant cavities require low optical loss, typically on the scale of parts per million. However, unintended micron-scale contaminants on the resonator mirrors that absorb the light circulating in the cavity can deform the surface thermoelastically and thus increase losses by scattering light out of the resonant mode. The point absorber effect is a limiting factor in some high-power cavity experiments, for example, the Advanced LIGO gravitational-wave detector. In this Letter, we present a general approach to the point absorber effect from first principles and simulate its contribution to the increased scattering. The achievable circulating power in current and future gravitational-wave detectors is calculated statistically given different point absorber configurations. Our formulation is further confirmed experimentally in comparison with the scattered power in the arm cavity of Advanced LIGO measured by in situ photodiodes. The understanding presented here provides an important tool in the global effort to design future gravitational-wave detectors that support high optical power and thus reduce quantum noise.
    Language English
    Publishing date 2021-12-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.127.241102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Quantum-Enhanced Advanced LIGO Detectors in the Era of Gravitational-Wave Astronomy.

    Tse, M / Yu, Haocun / Kijbunchoo, N / Fernandez-Galiana, A / Dupej, P / Barsotti, L / Blair, C D / Brown, D D / Dwyer, S E / Effler, A / Evans, M / Fritschel, P / Frolov, V V / Green, A C / Mansell, G L / Matichard, F / Mavalvala, N / McClelland, D E / McCuller, L /
    McRae, T / Miller, J / Mullavey, A / Oelker, E / Phinney, I Y / Sigg, D / Slagmolen, B J J / Vo, T / Ward, R L / Whittle, C / Abbott, R / Adams, C / Adhikari, R X / Ananyeva, A / Appert, S / Arai, K / Areeda, J S / Asali, Y / Aston, S M / Austin, C / Baer, A M / Ball, M / Ballmer, S W / Banagiri, S / Barker, D / Bartlett, J / Berger, B K / Betzwieser, J / Bhattacharjee, D / Billingsley, G / Biscans, S / Blair, R M / Bode, N / Booker, P / Bork, R / Bramley, A / Brooks, A F / Buikema, A / Cahillane, C / Cannon, K C / Chen, X / Ciobanu, A A / Clara, F / Cooper, S J / Corley, K R / Countryman, S T / Covas, P B / Coyne, D C / Datrier, L E H / Davis, D / Di Fronzo, C / Driggers, J C / Etzel, T / Evans, T M / Feicht, J / Fulda, P / Fyffe, M / Giaime, J A / Giardina, K D / Godwin, P / Goetz, E / Gras, S / Gray, C / Gray, R / Gupta, Anchal / Gustafson, E K / Gustafson, R / Hanks, J / Hanson, J / Hardwick, T / Hasskew, R K / Heintze, M C / Helmling-Cornell, A F / Holland, N A / Jones, J D / Kandhasamy, S / Karki, S / Kasprzack, M / Kawabe, K / King, P J / Kissel, J S / Kumar, Rahul / Landry, M / Lane, B B / Lantz, B / Laxen, M / Lecoeuche, Y K / Leviton, J / Liu, J / Lormand, M / Lundgren, A P / Macas, R / MacInnis, M / Macleod, D M / Márka, S / Márka, Z / Martynov, D V / Mason, K / Massinger, T J / McCarthy, R / McCormick, S / McIver, J / Mendell, G / Merfeld, K / Merilh, E L / Meylahn, F / Mistry, T / Mittleman, R / Moreno, G / Mow-Lowry, C M / Mozzon, S / Nelson, T J N / Nguyen, P / Nuttall, L K / Oberling, J / Oram, R J / O'Reilly, B / Osthelder, C / Ottaway, D J / Overmier, H / Palamos, J R / Parker, W / Payne, E / Pele, A / Perez, C J / Pirello, M / Radkins, H / Ramirez, K E / Richardson, J W / Riles, K / Robertson, N A / Rollins, J G / Romel, C L / Romie, J H / Ross, M P / Ryan, K / Sadecki, T / Sanchez, E J / Sanchez, L E / Saravanan, T R / Savage, R L / Schaetzl, D / Schnabel, R / Schofield, R M S / Schwartz, E / Sellers, D / Shaffer, T J / Smith, J R / Soni, S / Sorazu, B / Spencer, A P / Strain, K A / Sun, L / Szczepańczyk, M J / Thomas, M / Thomas, P / Thorne, K A / Toland, K / Torrie, C I / Traylor, G / Urban, A L / Vajente, G / Valdes, G / Vander-Hyde, D C / Veitch, P J / Venkateswara, K / Venugopalan, G / Viets, A D / Vorvick, C / Wade, M / Warner, J / Weaver, B / Weiss, R / Willke, B / Wipf, C C / Xiao, L / Yamamoto, H / Yap, M J / Yu, Hang / Zhang, L / Zucker, M E / Zweizig, J

    Physical review letters

    2019  Volume 123, Issue 23, Page(s) 231107

    Abstract: The Laser Interferometer Gravitational Wave Observatory (LIGO) has been directly detecting gravitational waves from compact binary mergers since 2015. We report on the first use of squeezed vacuum states in the direct measurement of gravitational waves ... ...

    Abstract The Laser Interferometer Gravitational Wave Observatory (LIGO) has been directly detecting gravitational waves from compact binary mergers since 2015. We report on the first use of squeezed vacuum states in the direct measurement of gravitational waves with the Advanced LIGO H1 and L1 detectors. This achievement is the culmination of decades of research to implement squeezed states in gravitational-wave detectors. During the ongoing O3 observation run, squeezed states are improving the sensitivity of the LIGO interferometers to signals above 50 Hz by up to 3 dB, thereby increasing the expected detection rate by 40% (H1) and 50% (L1).
    Language English
    Publishing date 2019-12-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.123.231107
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Point absorbers in Advanced LIGO.

    Brooks, Aidan F / Vajente, Gabriele / Yamamoto, Hiro / Abbott, Rich / Adams, Carl / Adhikari, Rana X / Ananyeva, Alena / Appert, Stephen / Arai, Koji / Areeda, Joseph S / Asali, Yasmeen / Aston, Stuart M / Austin, Corey / Baer, Anne M / Ball, Matthew / Ballmer, Stefan W / Banagiri, Sharan / Barker, David / Barsotti, Lisa /
    Bartlett, Jeffrey / Berger, Beverly K / Betzwieser, Joseph / Bhattacharjee, Dripta / Billingsley, Garilynn / Biscans, Sebastien / Blair, Carl D / Blair, Ryan M / Bode, Nina / Booker, Phillip / Bork, Rolf / Bramley, Alyssa / Brown, Daniel D / Buikema, Aaron / Cahillane, Craig / Cannon, Kipp C / Cao, Huy Tuong / Chen, Xu / Ciobanu, Alexei A / Clara, Filiberto / Compton, Camilla / Cooper, Sam J / Corley, Kenneth R / Countryman, Stefan T / Covas, Pep B / Coyne, Dennis C / Datrier, Laurence E / Davis, Derek / Difronzo, Chiara D / Dooley, Katherine L / Driggers, Jenne C / Dupej, Peter / Dwyer, Sheila E / Effler, Anamaria / Etzel, Todd / Evans, Matthew / Evans, Tom M / Feicht, Jon / Fernandez-Galiana, Alvaro / Fritschel, Peter / Frolov, Valery V / Fulda, Paul / Fyffe, Michael / Giaime, Joe A / Giardina, Dwayne D / Godwin, Patrick / Goetz, Evan / Gras, Slawomir / Gray, Corey / Gray, Rachel / Green, Anna C / Gupta, Anchal / Gustafson, Eric K / Gustafson, Dick / Hall, Evan / Hanks, Jonathan / Hanson, Joe / Hardwick, Terra / Hasskew, Raine K / Heintze, Matthew C / Helmling-Cornell, Adrian F / Holland, Nathan A / Izmui, Kiamu / Jia, Wenxuan / Jones, Jeff D / Kandhasamy, Shivaraj / Karki, Sudarshan / Kasprzack, Marie / Kawabe, Keita / Kijbunchoo, Nutsinee / King, Peter J / Kissel, Jeffrey S / Kumar, Rahul / Landry, Michael / Lane, Benjamin B / Lantz, Brian / Laxen, Michael / Lecoeuche, Yannick K / Leviton, Jessica / Jian, Liu / Lormand, Marc / Lundgren, Andrew P / Macas, Ronaldas / Macinnis, Myron / Macleod, Duncan M / Mansell, Georgia L / Marka, Szabolcs / Marka, Zsuzsanna / Martynov, Denis V / Mason, Ken / Massinger, Thomas J / Matichard, Fabrice / Mavalvala, Nergis / McCarthy, Richard / McClelland, David E / McCormick, Scott / McCuller, Lee / McIver, Jessica / McRae, Terry / Mendell, Gregory / Merfeld, Kara / Merilh, Edmond L / Meylahn, Fabian / Mistry, Timesh / Mittleman, Richard / Moreno, Gerardo / Mow-Lowry, Conor M / Mozzon, Simone / Mullavey, Adam / Nelson, Timothy J / Nguyen, Philippe / Nuttall, Laura K / Oberling, Jason / Oram, Richard J / Osthelder, Charles / Ottaway, David J / Overmier, Harry / Palamos, Jordan R / Parker, William / Payne, Ethan / Pele, Arnaud / Penhorwood, Reilly / Perez, Carlos J / Pirello, Marc / Radkins, Hugh / Ramirez, Karla E / Richardson, Jonathan W / Riles, Keith / Robertson, Norna A / Rollins, Jameson G / Romel, Chandra L / Romie, Janeen H / Ross, Michael P / Ryan, Kyle / Sadecki, Travis / Sanchez, Eduardo J / Sanchez, Luis E / Tiruppatturrajamanikkam, Saravanan R / Savage, Richard L / Schaetzl, Dean / Schnabel, Roman / Schofield, Robert M / Schwartz, Eyal / Sellers, Danny / Shaffer, Thomas / Sigg, Daniel / Slagmolen, Bram J / Smith, Joshua R / Soni, Siddharth / Sorazu, Borja / Spencer, Andrew P / Strain, Ken A / Sun, Ling / Szczepanczyk, Marek J / Thomas, Michael / Thomas, Patrick / Thorne, Keith A / Toland, Karl / Torrie, Calum I / Traylor, Gary / Tse, Maggie / Urban, Alexander L / Valdes, Guillermo / Vander-Hyde, Daniel C / Veitch, Peter J / Venkateswara, Krishna / Venugopalan, Gautam / Viets, Aaron D / Vo, Thomas / Vorvick, Cheryl / Wade, Madeline / Ward, Robert L / Warner, Jim / Weaver, Betsy / Weiss, Rainer / Whittle, Chris / Willke, Benno / Wipf, Christopher C / Xiao, Liting / Yu, Hang / Yu, Haocun / Zhang, Liyuan / Zucker, Michael E / Zweizig, John

    Applied optics

    2021  Volume 60, Issue 13, Page(s) 4047–4063

    Abstract: Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nanometer scale thermo-elastic deformations and substrate lenses from these micron-scale absorbers significantly reduce ... ...

    Abstract Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nanometer scale thermo-elastic deformations and substrate lenses from these micron-scale absorbers significantly reduce the sensitivity of the interferometer directly though a reduction in the power-recycling gain and indirect interactions with the feedback control system. We review the expected surface deformation from point absorbers and provide a pedagogical description of the impact on power buildup in second generation gravitational wave detectors (dual-recycled Fabry-Perot Michelson interferometers). This analysis predicts that the power-dependent reduction in interferometer performance will significantly degrade maximum stored power by up to 50% and, hence, limit GW sensitivity, but it suggests system wide corrections that can be implemented in current and future GW detectors. This is particularly pressing given that future GW detectors call for an order of magnitude more stored power than currently used in Advanced LIGO in Observing Run 3. We briefly review strategies to mitigate the effects of point absorbers in current and future GW wave detectors to maximize the success of these enterprises.
    Language English
    Publishing date 2021-05-03
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.419689
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO's and Advanced Virgo's Third Observing Run.

    Abbott, R / Abbott, T D / Acernese, F / Ackley, K / Adams, C / Adhikari, N / Adhikari, R X / Adya, V B / Affeldt, C / Agarwal, D / Agathos, M / Agatsuma, K / Aggarwal, N / Aguiar, O D / Aiello, L / Ain, A / Ajith, P / Albanesi, S / Allocca, A /
    Altin, P A / Amato, A / Anand, C / Anand, S / Ananyeva, A / Anderson, S B / Anderson, W G / Andrade, T / Andres, N / Andrić, T / Angelova, S V / Ansoldi, S / Antelis, J M / Antier, S / Appert, S / Arai, K / Araya, M C / Areeda, J S / Arène, M / Arnaud, N / Aronson, S M / Arun, K G / Asali, Y / Ashton, G / Assiduo, M / Aston, S M / Astone, P / Aubin, F / Austin, C / Babak, S / Badaracco, F / Bader, M K M / Badger, C / Bae, S / Baer, A M / Bagnasco, S / Bai, Y / Baird, J / Ball, M / Ballardin, G / Ballmer, S W / Balsamo, A / Baltus, G / Banagiri, S / Bankar, D / Barayoga, J C / Barbieri, C / Barish, B C / Barker, D / Barneo, P / Barone, F / Barr, B / Barsotti, L / Barsuglia, M / Barta, D / Bartlett, J / Barton, M A / Bartos, I / Bassiri, R / Basti, A / Bawaj, M / Bayley, J C / Baylor, A C / Bazzan, M / Bécsy, B / Bedakihale, V M / Bejger, M / Belahcene, I / Benedetto, V / Beniwal, D / Bennett, T F / Bentley, J D / BenYaala, M / Bergamin, F / Berger, B K / Bernuzzi, S / Berry, C P L / Bersanetti, D / Bertolini, A / Betzwieser, J / Beveridge, D / Bhandare, R / Bhardwaj, U / Bhattacharjee, D / Bhaumik, S / Bilenko, I A / Billingsley, G / Bini, S / Birney, R / Birnholtz, O / Biscans, S / Bischi, M / Biscoveanu, S / Bisht, A / Biswas, B / Bitossi, M / Bizouard, M-A / Blackburn, J K / Blair, C D / Blair, D G / Blair, R M / Bobba, F / Bode, N / Boer, M / Bogaert, G / Boldrini, M / Bonavena, L D / Bondu, F / Bonilla, E / Bonnand, R / Booker, P / Boom, B A / Bork, R / Boschi, V / Bose, N / Bose, S / Bossilkov, V / Boudart, V / Bouffanais, Y / Bozzi, A / Bradaschia, C / Brady, P R / Bramley, A / Branch, A / Branchesi, M / Brau, J E / Breschi, M / Briant, T / Briggs, J H / Brillet, A / Brinkmann, M / Brockill, P / Brooks, A F / Brooks, J / Brown, D D / Brunett, S / Bruno, G / Bruntz, R / Bryant, J / Bulik, T / Bulten, H J / Buonanno, A / Buscicchio, R / Buskulic, D / Buy, C / Byer, R L / Cadonati, L / Cagnoli, G / Cahillane, C / Bustillo, J Calderón / Callaghan, J D / 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    Physical review letters

    2022  Volume 129, Issue 6, Page(s) 61104

    Abstract: We report on a search for compact binary coalescences where at least one binary component has a mass between 0.2  M_{⊙} and 1.0  M_{⊙} in Advanced LIGO and Advanced Virgo data collected between 1 April 2019 1500 UTC and 1 October 2019 1500 UTC. We extend ...

    Abstract We report on a search for compact binary coalescences where at least one binary component has a mass between 0.2  M_{⊙} and 1.0  M_{⊙} in Advanced LIGO and Advanced Virgo data collected between 1 April 2019 1500 UTC and 1 October 2019 1500 UTC. We extend our previous analyses in two main ways: we include data from the Virgo detector and we allow for more unequal mass systems, with mass ratio q≥0.1. We do not report any gravitational-wave candidates. The most significant trigger has a false alarm rate of 0.14  yr^{-1}. This implies an upper limit on the merger rate of subsolar binaries in the range [220-24200]  Gpc^{-3} yr^{-1}, depending on the chirp mass of the binary. We use this upper limit to derive astrophysical constraints on two phenomenological models that could produce subsolar-mass compact objects. One is an isotropic distribution of equal-mass primordial black holes. Using this model, we find that the fraction of dark matter in primordial black holes in the mass range 0.2  M_{⊙}<m_{PBH}<1.0  M_{⊙} is f_{PBH}≡Ω_{PBH}/Ω_{DM}≲6%. This improves existing constraints on primordial black hole abundance by a factor of ∼3. The other is a dissipative dark matter model, in which fermionic dark matter can collapse and form black holes. The upper limit on the fraction of dark matter black holes depends on the minimum mass of the black holes that can be formed: the most constraining result is obtained at M_{min}=1  M_{⊙}, where f_{DBH}≡Ω_{DBH}/Ω_{DM}≲0.003%. These are the first constraints placed on dissipative dark models by subsolar-mass analyses.<br />
    Language English
    Publishing date 2022-08-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.129.061104
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: GW190521: A Binary Black Hole Merger with a Total Mass of 150  M_{⊙}.

    Abbott, R / Abbott, T D / Abraham, S / Acernese, F / Ackley, K / Adams, C / Adhikari, R X / Adya, V B / Affeldt, C / Agathos, M / Agatsuma, K / Aggarwal, N / Aguiar, O D / Aich, A / Aiello, L / Ain, A / Ajith, P / Akcay, S / Allen, G /
    Allocca, A / Altin, P A / Amato, A / Anand, S / Ananyeva, A / Anderson, S B / Anderson, W G / Angelova, S V / Ansoldi, S / Antier, S / Appert, S / Arai, K / Araya, M C / Areeda, J S / Arène, M / Arnaud, N / Aronson, S M / Arun, K G / Asali, Y / Ascenzi, S / Ashton, G / Aston, S M / Astone, P / Aubin, F / Aufmuth, P / AultONeal, K / Austin, C / Avendano, V / Babak, S / Bacon, P / Badaracco, F / Bader, M K M / Bae, S / Baer, A M / Baird, J / Baldaccini, F / Ballardin, G / Ballmer, S W / Bals, A / Balsamo, A / Baltus, G / Banagiri, S / Bankar, D / Bankar, R S / Barayoga, J C / Barbieri, C / Barish, B C / Barker, D / Barkett, K / Barneo, P / Barone, F / Barr, B / Barsotti, L / Barsuglia, M / Barta, D / Bartlett, J / Bartos, I / Bassiri, R / Basti, A / Bawaj, M / Bayley, J C / Bazzan, M / Bécsy, B / Bejger, M / Belahcene, I / Bell, A S / Beniwal, D / Benjamin, M G / Bentley, J D / Bergamin, F / Berger, B K / Bergmann, G / Bernuzzi, S / Berry, C P L / Bersanetti, D / Bertolini, A / Betzwieser, J / Bhandare, R / Bhandari, A V / Bidler, J / Biggs, E / Bilenko, I A / Billingsley, G / Birney, R / Birnholtz, O / Biscans, S / Bischi, M / Biscoveanu, S / Bisht, A / Bissenbayeva, G / Bitossi, M / Bizouard, M A / Blackburn, J K / Blackman, J / Blair, C D / Blair, D G / Blair, R M / Bobba, F / Bode, N / Boer, M / Boetzel, Y / Bogaert, G / Bondu, F / Bonilla, E / Bonnand, R / Booker, P / Boom, B A / Bork, R / Boschi, V / Bose, S / Bossilkov, V / Bosveld, J / Bouffanais, Y / Bozzi, A / Bradaschia, C / Brady, P R / Bramley, A / Branchesi, M / Brau, J E / Breschi, M / Briant, T / Briggs, J H / Brighenti, F / Brillet, A / Brinkmann, M / Brockill, P / Brooks, A F / Brooks, J / Brown, D D / Brunett, S / Bruno, G / Bruntz, R / Buikema, A / Bulik, T / Bulten, H J / Buonanno, A / Buscicchio, R / Buskulic, D / Byer, R L / Cabero, M / Cadonati, L / Cagnoli, G / Cahillane, C / Calderón Bustillo, J / Callaghan, J D / Callister, T A / Calloni, E / Camp, J B / Canepa, M / Cannon, K C / 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Corre, D / Corsi, A / Cortese, S / Costa, C A / Cotesta, R / Coughlin, M W / Coughlin, S B / Coulon, J-P / Countryman, S T / Couvares, P / Covas, P B / Coward, D M / Cowart, M J / Coyne, D C / Coyne, R / Creighton, J D E / Creighton, T D / Cripe, J / Croquette, M / Crowder, S G / Cudell, J-R / Cullen, T J / Cumming, A / Cummings, R / Cunningham, L / Cuoco, E / Curylo, M / Canton, T Dal / Dálya, G / Dana, A / Daneshgaran-Bajastani, L M / D'Angelo, B / Danilishin, S L / D'Antonio, S / Danzmann, K / Darsow-Fromm, C / Dasgupta, A / Datrier, L E H / Dattilo, V / Dave, I / Davier, M / Davies, G S / Davis, D / Daw, E J / DeBra, D / Deenadayalan, M / Degallaix, J / De Laurentis, M / Deléglise, S / Delfavero, M / De Lillo, N / Del Pozzo, W / DeMarchi, L M / D'Emilio, V / Demos, N / Dent, T / De Pietri, R / De Rosa, R / De Rossi, C / DeSalvo, R / de Varona, O / Dhurandhar, S / Díaz, M C / Diaz-Ortiz, M / Dietrich, T / Di Fiore, L / Di Fronzo, C / Di Giorgio, C / Di Giovanni, F / Di Giovanni, M / Di Girolamo, T / Di Lieto, A / Ding, B / Di Pace, S / Di Palma, I / Di Renzo, F / Divakarla, A K / Dmitriev, A / Doctor, Z / Donovan, F / Dooley, K L / Doravari, S / Dorrington, I / Downes, T P / Drago, M / Driggers, J C / Du, Z / Ducoin, J-G / Dupej, P / Durante, O / D'Urso, D / Dwyer, S E / Easter, P J / Eddolls, G / Edelman, B / Edo, T B / Edy, O / Effler, A / Ehrens, P / Eichholz, J / Eikenberry, S S / Eisenmann, M / Eisenstein, R A / Ejlli, A / Errico, L / Essick, R C / Estelles, H / Estevez, D / Etienne, Z B / Etzel, T / Evans, M / Evans, T M / Ewing, B E / Fafone, V / Fairhurst, S / Fan, X / Farinon, S / Farr, B / Farr, W M / Fauchon-Jones, E J / Favata, M / Fays, M / Fazio, M / Feicht, J / Fejer, M M / Feng, F / Fenyvesi, E / Ferguson, D L / Fernandez-Galiana, A / Ferrante, I / Ferreira, E C / Ferreira, T A / Fidecaro, F / Fiori, I / Fiorucci, D / Fishbach, M / Fisher, R P / Fittipaldi, R / Fitz-Axen, M / Fiumara, V / Flaminio, R / Floden, E / Flynn, E / Fong, H / Font, J A / 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K / Guo, Y / Gupta, A / Gupta, Anchal / Gupta, P / Gustafson, E K / Gustafson, R / Haegel, L / Halim, O / Hall, E D / Hamilton, E Z / Hammond, G / Haney, M / Hanke, M M / Hanks, J / Hanna, C / Hannam, M D / Hannuksela, O A / Hansen, T J / Hanson, J / Harder, T / Hardwick, T / Haris, K / Harms, J / Harry, G M / Harry, I W / Hasskew, R K / Haster, C-J / Haughian, K / Hayes, F J / Healy, J / Heidmann, A / Heintze, M C / Heinze, J / Heitmann, H / Hellman, F / Hello, P / Hemming, G / Hendry, M / Heng, I S / Hennes, E / Hennig, J / Heurs, M / Hild, S / Hinderer, T / Hoback, S Y / Hochheim, S / Hofgard, E / Hofman, D / Holgado, A M / Holland, N A / Holt, K / Holz, D E / Hopkins, P / Horst, C / Hough, J / Howell, E J / Hoy, C G / Huang, Y / Hübner, M T / Huerta, E A / Huet, D / Hughey, B / Hui, V / Husa, S / Huttner, S H / Huxford, R / Huynh-Dinh, T / Idzkowski, B / Iess, A / Inchauspe, H / Ingram, C / Intini, G / Isac, J-M / Isi, M / Iyer, B R / Jacqmin, T / Jadhav, S J / Jadhav, S P / James, A L / Jani, K / Janthalur, N N / Jaranowski, P / Jariwala, D / Jaume, R / Jenkins, A C / Jiang, J / Johns, G R / Johnson-McDaniel, N K / Jones, A W / Jones, D I / Jones, J D / Jones, P / Jones, R / Jonker, R J G / Ju, L / Junker, J / Kalaghatgi, C V / Kalogera, V / Kamai, B / Kandhasamy, S / Kang, G / Kanner, J B / Kapadia, S J / Karki, S / Kashyap, R / Kasprzack, M / Kastaun, W / Katsanevas, S / Katsavounidis, E / Katzman, W / Kaufer, S / Kawabe, K / Kéfélian, F / Keitel, D / Keivani, A / Kennedy, R / Key, J S / Khadka, S / Khalili, F Y / Khan, I / Khan, S / Khan, Z A / Khazanov, E A / Khetan, N / Khursheed, M / Kijbunchoo, N / Kim, Chunglee / Kim, G J / Kim, J C / Kim, K / Kim, W / Kim, W S / Kim, Y-M / Kimball, C / King, P J / Kinley-Hanlon, M / Kirchhoff, R / Kissel, J S / Kleybolte, L / Klimenko, S / Knowles, T D / Knyazev, E / Koch, P / Koehlenbeck, S M / Koekoek, G / Koley, S / Kondrashov, V / Kontos, A / Koper, N / Korobko, M / Korth, W Z / Kovalam, M / Kozak, D B / Kringel, V 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    Physical review letters

    2021  Volume 125, Issue 10, Page(s) 101102

    Abstract: On May 21, 2019 at 03:02:29 UTC Advanced LIGO and Advanced Virgo observed a short duration gravitational-wave signal, GW190521, with a three-detector network signal-to-noise ratio of 14.7, and an estimated false-alarm rate of 1 in 4900 yr using a search ... ...

    Abstract On May 21, 2019 at 03:02:29 UTC Advanced LIGO and Advanced Virgo observed a short duration gravitational-wave signal, GW190521, with a three-detector network signal-to-noise ratio of 14.7, and an estimated false-alarm rate of 1 in 4900 yr using a search sensitive to generic transients. If GW190521 is from a quasicircular binary inspiral, then the detected signal is consistent with the merger of two black holes with masses of 85_{-14}^{+21}  M_{⊙} and 66_{-18}^{+17}  M_{⊙} (90% credible intervals). We infer that the primary black hole mass lies within the gap produced by (pulsational) pair-instability supernova processes, with only a 0.32% probability of being below 65  M_{⊙}. We calculate the mass of the remnant to be 142_{-16}^{+28}  M_{⊙}, which can be considered an intermediate mass black hole (IMBH). The luminosity distance of the source is 5.3_{-2.6}^{+2.4}  Gpc, corresponding to a redshift of 0.82_{-0.34}^{+0.28}. The inferred rate of mergers similar to GW190521 is 0.13_{-0.11}^{+0.30}  Gpc^{-3} yr^{-1}.
    Language English
    Publishing date 2021-02-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.125.101102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Constraints on Cosmic Strings Using Data from the Third Advanced LIGO-Virgo Observing Run.

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    Physical review letters

    2021  Volume 126, Issue 24, Page(s) 241102

    Abstract: We search for gravitational-wave signals produced by cosmic strings in the Advanced LIGO and Virgo full O3 dataset. Search results are presented for gravitational waves produced by cosmic string loop features such as cusps, kinks, and, for the first time, ...

    Abstract We search for gravitational-wave signals produced by cosmic strings in the Advanced LIGO and Virgo full O3 dataset. Search results are presented for gravitational waves produced by cosmic string loop features such as cusps, kinks, and, for the first time, kink-kink collisions. A template-based search for short-duration transient signals does not yield a detection. We also use the stochastic gravitational-wave background energy density upper limits derived from the O3 data to constrain the cosmic string tension Gμ as a function of the number of kinks, or the number of cusps, for two cosmic string loop distribution models. Additionally, we develop and test a third model that interpolates between these two models. Our results improve upon the previous LIGO-Virgo constraints on Gμ by 1 to 2 orders of magnitude depending on the model that is tested. In particular, for the one-loop distribution model, we set the most competitive constraints to date: Gμ≲4×10^{-15}. In the case of cosmic strings formed at the end of inflation in the context of grand unified theories, these results challenge simple inflationary models.
    Language English
    Publishing date 2021-07-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.126.241102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Tests of General Relativity with Binary Black Holes from the second LIGO-Virgo Gravitational-Wave Transient Catalog

    Collaboration, The LIGO Scientific / Abbott, the Virgo Collaboration R. / Abbott, T. D. / Abraham, S. / Acernese, F. / Ackley, K. / Adams, A. / Adams, C. / Adhikari, R. X. / Adya, V. B. / Affeldt, C. / Agathos, M. / Agatsuma, K. / Aggarwal, N. / Aguiar, O. D. / Aiello, L. / Ain, A. / Ajith, P. / Allen, G. /
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    Abstract: Gravitational waves enable tests of general relativity in the highly dynamical and strong-field regime. Using events detected by LIGO-Virgo up to 1 October 2019, we evaluate the consistency of the data with predictions from the theory. We first establish ...

    Abstract Gravitational waves enable tests of general relativity in the highly dynamical and strong-field regime. Using events detected by LIGO-Virgo up to 1 October 2019, we evaluate the consistency of the data with predictions from the theory. We first establish that residuals from the best-fit waveform are consistent with detector noise, and that the low- and high-frequency parts of the signals are in agreement. We then consider parametrized modifications to the waveform by varying post-Newtonian and phenomenological coefficients, improving past constraints by factors of ${\sim}2$; we also find consistency with Kerr black holes when we specifically target signatures of the spin-induced quadrupole moment. Looking for gravitational-wave dispersion, we tighten constraints on Lorentz-violating coefficients by a factor of ${\sim}2.6$ and bound the mass of the graviton to $m_g \leq 1.76 \times 10^{-23} \mathrm{eV}/c^2$ with 90% credibility. We also analyze the properties of the merger remnants by measuring ringdown frequencies and damping times, constraining fractional deviations away from the Kerr frequency to $\delta \hat{f}_{220} = 0.03^{+0.38}_{-0.35}$ for the fundamental quadrupolar mode, and $\delta \hat{f}_{221} = 0.04^{+0.27}_{-0.32}$ for the first overtone; additionally, we find no evidence for postmerger echoes. Finally, we determine that our data are consistent with tensorial polarizations through a template-independent method. When possible, we assess the validity of general relativity based on collections of events analyzed jointly. We find no evidence for new physics beyond general relativity, for black hole mimickers, or for any unaccounted systematics.
    Keywords covid19
    Publisher ArXiv
    Document type Article
    Database COVID19

    Kategorien

  10. Article ; Online: Properties and astrophysical implications of the 150 Msun binary black hole merger GW190521

    Collaboration, The LIGO Scientific / Abbott, the Virgo Collaboration R. / Abbott, T. D. / Abraham, S. / Acernese, F. / Ackley, K. / Adams, C. / Adhikari, R. X. / Adya, V. B. / Affeldt, C. / Agathos, M. / Agatsuma, K. / Aggarwal, N. / Aguiar, O. D. / Aich, A. / Aiello, L. / Ain, A. / Ajith, P. / Akcay, S. /
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K. / Zadro.zny, A. / Zanolin, M. / Zelenova, T. / Zendri, J.-P. / Zevin, M. / Zhang, J. / Zhang, L. / Zhang, T. / Zhao, C. / Zhao, G. / Zhou, M. / Zhou, Z. / Zhu, X. J. / Zimmerman, A. B. / Zlochower, Y. / Zucker, M. E. / Zweizig, J.

    Abstract: The gravitational-wave signal GW190521 is consistent with a binary black hole merger source at redshift 0.8 with unusually high component masses, $85^{+21}_{-14}\,M_{\odot}$ and $66^{+17}_{-18}\,M_{\odot}$, compared to previously reported events, and ... ...

    Abstract The gravitational-wave signal GW190521 is consistent with a binary black hole merger source at redshift 0.8 with unusually high component masses, $85^{+21}_{-14}\,M_{\odot}$ and $66^{+17}_{-18}\,M_{\odot}$, compared to previously reported events, and shows mild evidence for spin-induced orbital precession. The primary falls in the mass gap predicted by (pulsational) pair-instability supernova theory, in the approximate range $65 - 120\,M_{\odot}$. The probability that at least one of the black holes in GW190521 is in that range is 99.0%. The final mass of the merger $(142^{+28}_{-16}\,M_{\odot})$ classifies it as an intermediate-mass black hole. Under the assumption of a quasi-circular binary black hole coalescence, we detail the physical properties of GW190521's source binary and its post-merger remnant, including component masses and spin vectors. Three different waveform models, as well as direct comparison to numerical solutions of general relativity, yield consistent estimates of these properties. Tests of strong-field general relativity targeting the merger-ringdown stages of coalescence indicate consistency of the observed signal with theoretical predictions. We estimate the merger rate of similar systems to be $0.13^{+0.30}_{-0.11}\,{\rm Gpc}^{-3}\,\rm{yr}^{-1}$. We discuss the astrophysical implications of GW190521 for stellar collapse, and for the possible formation of black holes in the pair-instability mass gap through various channels: via (multiple) stellar coalescence, or via hierarchical merger of lower-mass black holes in star clusters or in active galactic nuclei. We find it to be unlikely that GW190521 is a strongly lensed signal of a lower-mass black hole binary merger. We also discuss more exotic possible sources for GW190521, including a highly eccentric black hole binary, or a primordial black hole binary.
    Keywords covid19
    Publisher ArXiv
    Document type Article ; Online
    DOI 10.3847/2041-8213/aba493
    Database COVID19

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