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  1. Article ; Online: New Spin on LIGO-Virgo Binary Black Holes.

    Biscoveanu, Sylvia / Isi, Maximiliano / Vitale, Salvatore / Varma, Vijay

    Physical review letters

    2021  Volume 126, Issue 17, Page(s) 171103

    Abstract: Gravitational waves from binary black holes have the potential to yield information on both of the intrinsic parameters that characterize the compact objects: their masses and spins. While the component masses are usually resolvable, the component spins ... ...

    Abstract Gravitational waves from binary black holes have the potential to yield information on both of the intrinsic parameters that characterize the compact objects: their masses and spins. While the component masses are usually resolvable, the component spins have proven difficult to measure. This limitation stems in great part from our choice to inquire about the spins of the most and least massive objects in each binary, a question that becomes ill defined when the masses are equal. In this Letter, we show that one can ask a different question of the data: what are the spins of the objects with the highest and lowest dimensionless spins in the binary? We show that this can significantly improve estimates of the individual spins, especially for binary systems with comparable masses. When applying this parametrization to the first 13 gravitational-wave events detected by the LIGO-Virgo Collaboration (LVC), we find that the highest-spinning object is constrained to have nonzero spin for most sources and to have significant support at the Kerr limit for GW151226 and GW170729. A joint analysis of all the confident binary black hole detections by the LVC finds that, unlike with the traditional parametrization, the distribution of spin magnitude for the highest-spinning object has negligible support at zero spin. Regardless of the parametrization used, the configuration where all of the spins in the population are aligned with the orbital angular momentum is excluded from the 90% credible interval for the first ten events and from the 99% credible interval for all current confident detections.
    Language English
    Publishing date 2021-05-14
    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.126.171103
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Measuring the Primordial Gravitational-Wave Background in the Presence of Astrophysical Foregrounds.

    Biscoveanu, Sylvia / Talbot, Colm / Thrane, Eric / Smith, Rory

    Physical review letters

    2021  Volume 125, Issue 24, Page(s) 241101

    Abstract: Primordial gravitational waves are expected to create a stochastic background encoding information about the early Universe that may not be accessible by other means. However, the primordial background is obscured by an astrophysical foreground ... ...

    Abstract Primordial gravitational waves are expected to create a stochastic background encoding information about the early Universe that may not be accessible by other means. However, the primordial background is obscured by an astrophysical foreground consisting of gravitational waves from compact binaries. We demonstrate a Bayesian method for estimating the primordial background in the presence of an astrophysical foreground. Since the background and foreground signal parameters are estimated simultaneously, there is no subtraction step, and therefore we avoid astrophysical contamination of the primordial measurement, sometimes referred to as "residuals." Additionally, since we include the non-Gaussianity of the astrophysical foreground in our model, this method represents the statistically optimal approach to the simultaneous detection of a multicomponent stochastic background.
    Language English
    Publishing date 2021-01-07
    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.125.241101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Extracting the Gravitational Recoil from Black Hole Merger Signals.

    Varma, Vijay / Isi, Maximiliano / Biscoveanu, Sylvia

    Physical review letters

    2020  Volume 124, Issue 10, Page(s) 101104

    Abstract: Gravitational waves carry energy, angular momentum, and linear momentum. In generic binary black hole mergers, the loss of linear momentum imparts a recoil velocity, or a "kick," to the remnant black hole. We exploit recent advances in gravitational ... ...

    Abstract Gravitational waves carry energy, angular momentum, and linear momentum. In generic binary black hole mergers, the loss of linear momentum imparts a recoil velocity, or a "kick," to the remnant black hole. We exploit recent advances in gravitational waveform and remnant black hole modeling to extract information about the kick from the gravitational wave signal. Kick measurements such as these are astrophysically valuable, enabling independent constraints on the rate of second-generation merger. Further, we show that kicks must be factored into future ringdown tests of general relativity with third-generation gravitational wave detectors to avoid systematic biases. We find that, although little information can be gained about the kick for existing gravitational wave events, interesting measurements will soon become possible as detectors improve. We show that, once LIGO and Virgo reach their design sensitivities, we will reliably extract the kick velocity for generically precessing binaries-including the so-called superkicks, reaching up to 5000  km/s.
    Language English
    Publishing date 2020-03-26
    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.124.101104
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Hints of Spin-Orbit Resonances in the Binary Black Hole Population.

    Varma, Vijay / Biscoveanu, Sylvia / Isi, Maximiliano / Farr, Will M / Vitale, Salvatore

    Physical review letters

    2022  Volume 128, Issue 3, Page(s) 31101

    Abstract: Binary black hole spin measurements from gravitational wave observations can reveal the binary's evolutionary history. In particular, the spin orientations of the component black holes within the orbital plane, ϕ_{1} and ϕ_{2}, can be used to identify ... ...

    Abstract Binary black hole spin measurements from gravitational wave observations can reveal the binary's evolutionary history. In particular, the spin orientations of the component black holes within the orbital plane, ϕ_{1} and ϕ_{2}, can be used to identify binaries caught in the so-called spin-orbit resonances. In a companion paper, we demonstrate that ϕ_{1} and ϕ_{2} are best measured near the merger of the two black holes. In this work, we use these spin measurements to provide the first constraints on the full six-dimensional spin distribution of merging binary black holes. In particular, we find that there is a preference for Δϕ=ϕ_{1}-ϕ_{2}∼±π in the population, which can be a signature of spin-orbit resonances. We also find a preference for ϕ_{1}∼-π/4 with respect to the line of separation near merger, which has not been predicted for any astrophysical formation channel. However, the strength of these preferences depends on our prior choices, and we are unable to constrain the widths of the ϕ_{1} and Δϕ distributions. Therefore, more observations are necessary to confirm the features we find. Finally, we derive constraints on the distribution of recoil kicks in the population and use this to estimate the fraction of merger remnants retained by globular and nuclear star clusters. We make our spin and kick population constraints publicly available.
    Language English
    Publishing date 2022-02-04
    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.128.031101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Evidence of Large Recoil Velocity from a Black Hole Merger Signal.

    Varma, Vijay / Biscoveanu, Sylvia / Islam, Tousif / Shaik, Feroz H / Haster, Carl-Johan / Isi, Maximiliano / Farr, Will M / Field, Scott E / Vitale, Salvatore

    Physical review letters

    2022  Volume 128, Issue 19, Page(s) 191102

    Abstract: The final black hole left behind after a binary black hole merger can attain a recoil velocity, or a "kick," reaching values up to 5000  km/s. This phenomenon has important implications for gravitational wave astronomy, black hole formation scenarios, ... ...

    Abstract The final black hole left behind after a binary black hole merger can attain a recoil velocity, or a "kick," reaching values up to 5000  km/s. This phenomenon has important implications for gravitational wave astronomy, black hole formation scenarios, testing general relativity, and galaxy evolution. We consider the gravitational wave signal from the binary black hole merger GW200129_065458 (henceforth referred to as GW200129), which has been shown to exhibit strong evidence of orbital precession. Using numerical relativity surrogate models, we constrain the kick velocity of GW200129 to v_{f}∼1542_{-1098}^{+747}  km/s or v_{f}≳698  km/s (one-sided limit), at 90% credibility. This marks the first identification of a large kick velocity for an individual gravitational wave event. Given the kick velocity of GW200129, we estimate that there is a less than 0.48% (7.7%) probability that the remnant black hole after the merger would be retained by globular (nuclear star) clusters. Finally, we show that kick effects are not expected to cause biases in ringdown tests of general relativity for this event, although this may change in the future with improved detectors.
    Language English
    Publishing date 2022-05-27
    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.128.191102
    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 / Callister, T A / Calloni, E / Cameron, J / Camp, J B / Canepa, M / Canevarolo, S / Cannavacciuolo, M / Cannon, K C / Cao, H / Capote, E / Carapella, G / Carbognani, F / Carlin, J B / Carney, M F / Carpinelli, M / Carrillo, G / Carullo, G / Carver, T L / Diaz, J Casanueva / Casentini, C / Castaldi, G / Caudill, S / Cavaglià, M / Cavalier, F / Cavalieri, R / Ceasar, M / Cella, G / Cerdá-Durán, P / Cesarini, E / Chaibi, W / Chakravarti, K / Subrahmanya, S Chalathadka / Champion, E / Chan, C-H / Chan, C / Chan, C L / Chan, K / Chandra, K / Chanial, P / Chao, S / Charlton, P / Chase, E A / Chassande-Mottin, E / Chatterjee, C / Chatterjee, Debarati / Chatterjee, Deep / Chaturvedi, M / Chaty, S / Chatziioannou, K / Chen, H Y / Chen, J / Chen, X / Chen, Y / Chen, Z / Cheng, H / Cheong, C K / Cheung, H Y / Chia, H Y / Chiadini, F / Chiarini, G / Chierici, R / Chincarini, A / Chiofalo, M L / Chiummo, A / Cho, G / Cho, H S / Choudhary, R K / Choudhary, S / Christensen, N / Chu, Q / Chua, S / Chung, K W / Ciani, G / Ciecielag, P / Cieślar, M / Cifaldi, M / Ciobanu, A A / Ciolfi, R / Cipriano, F / Cirone, A / Clara, F / Clark, E N / Clark, J A / Clarke, L / Clearwater, P / Clesse, S / Cleva, F / Coccia, E / Codazzo, E / Cohadon, P-F / Cohen, D E / Cohen, L / Colleoni, M / Collette, C G / Colombo, A / Colpi, M / Compton, C M / Constancio, M / Conti, L / Cooper, S J / Corban, P / Corbitt, T R / Cordero-Carrión, I / Corezzi, S / Corley, K R / Cornish, N / Corre, D / Corsi, A / Cortese, S / Costa, C A / Cotesta, R / Coughlin, M W / Coulon, J-P / Countryman, S T / Cousins, B / Couvares, P / Coward, D M / Cowart, M J / Coyne, D C / Coyne, R / Creighton, J D E / Creighton, T D / Criswell, A W / Croquette, M / Crowder, S G / Cudell, J R / Cullen, T J / Cumming, A / Cummings, R / Cunningham, L / Cuoco, E / Curyło, M / Dabadie, P / Canton, T Dal / Dall'Osso, S / Dálya, G / Dana, A / DaneshgaranBajastani, L M / D'Angelo, B / Danilishin, S / D'Antonio, S / Danzmann, K / Darsow-Fromm, C / Dasgupta, A / Datrier, L E H / Datta, S / Dattilo, V / Dave, I / Davier, M / Davies, G S / Davis, D / Davis, M C / Daw, E J / Dean, R / DeBra, D / Deenadayalan, M / Degallaix, J / De Laurentis, M / Deléglise, S / Del Favero, V / De Lillo, F / De Lillo, N / Del Pozzo, W / DeMarchi, L M / De Matteis, F / D'Emilio, V / Demos, N / Dent, T / Depasse, A / De Pietri, R / De Rosa, R / De Rossi, C / DeSalvo, R / De Simone, R / Dhurandhar, S / Díaz, M C / Diaz-Ortiz, M / Didio, N A / 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 / D'Onofrio, L / Donovan, F / Dooley, K L / Doravari, S / Dorrington, I / Drago, M / Driggers, J C / Drori, Y / Ducoin, J-G / Dupej, P / Durante, O / D'Urso, D / Duverne, P-A / Dwyer, S E / Eassa, C / Easter, P J / Ebersold, M / Eckhardt, T / Eddolls, G / Edelman, B / Edo, T B / Edy, O / Effler, A / Eichholz, J / Eikenberry, S S / Eisenmann, M / Eisenstein, R A / Ejlli, A / Engelby, E / Errico, L / Essick, R C / Estellés, H / Estevez, D / Etienne, Z / Etzel, T / Evans, M / Evans, T M / Ewing, B E / Fafone, V / Fair, H / Fairhurst, S / Farah, A M / Farinon, S / Farr, B / Farr, W M / Farrow, N W / Fauchon-Jones, E J / Favaro, G / Favata, M / Fays, M / Fazio, M / Feicht, J / Fejer, M M / Fekecs, B / Fenyvesi, E / Ferguson, D L / Fernandez-Galiana, A / Ferrante, I / Ferreira, T A / Fidecaro, F / Figura, P / Fiori, I / Fishbach, M / Fisher, R P / Fittipaldi, R / Fiumara, V / Flaminio, R / Floden, E / Fong, H / Font, J A / Fornal, B / Forsyth, P W F / Franke, A / Frasca, S / Frasconi, F / Frederick, C / Freed, J P / Frei, Z / Freise, A / Frey, R / Fritschel, P / Frolov, V V / Fronzé, G G / Fulda, P / Fyffe, M / Gabbard, H A / Gadre, B U / Gair, J R / Gais, J / Galaudage, S / Gamba, R / Ganapathy, D / Ganguly, A / Gaonkar, S G / Garaventa, B / García-Núñez, C / García-Quirós, C / Garufi, F / Gateley, B / Gaudio, S / Gayathri, V / Gemme, G / Gennai, A / George, J / Gerberding, O / Gergely, L / Gewecke, P / Ghonge, S / Ghosh, Abhirup / Ghosh, Archisman / Ghosh, Shaon / Ghosh, Shrobana / Giacomazzo, B / Giacoppo, L / Giaime, J A / Giardina, K D / Gibson, D R / Gier, C / Giesler, M / Giri, P / Gissi, F / Glanzer, J / Gleckl, A E / Godwin, P / Goetz, E / Goetz, R / Gohlke, N / Goncharov, B / González, G / Gopakumar, A / Gosselin, M / Gouaty, R / Gould, D W / Grace, B / Grado, A / Granata, M / Granata, V / Grant, A / Gras, S / Grassia, P / Gray, C / Gray, R / Greco, G / Green, A C / Green, R / Gretarsson, A M / Gretarsson, E M / Griffith, D / Griffiths, W / Griggs, H L / Grignani, G / Grimaldi, A / Grimm, S J / Grote, H / Grunewald, S / Gruning, P / Guerra, D / Guidi, G M / Guimaraes, A R / Guixé, G / Gulati, H K / Guo, H-K / Guo, Y / Gupta, Anchal / Gupta, Anuradha / Gupta, P / Gustafson, E K / Gustafson, R / Guzman, F / Haegel, L / Halim, O / Hall, E D / Hamilton, E Z / Hammond, G / Haney, M / Hanks, J / Hanna, C / Hannam, M D / Hannuksela, O / Hansen, H / Hansen, T J / Hanson, J / Harder, T / Hardwick, T / Haris, K / Harms, J / Harry, G M / Harry, I W / Hartwig, D / Haskell, B / Hasskew, R K / Haster, C-J / Haughian, K / Hayes, F J / Healy, J / Heidmann, A / Heidt, A / Heintze, M C / Heinze, J / Heinzel, J / Heitmann, H / Hellman, F / Hello, P / Helmling-Cornell, A F / Hemming, G / Hendry, M / Heng, I S / Hennes, E / Hennig, J / Hennig, M H / Hernandez, A G / Vivanco, F Hernandez / Heurs, M / Hild, S / Hill, P / Hines, A S / Hochheim, S / Hofman, D / Hohmann, J N / Holcomb, D G / Holland, N A / Hollows, I J / Holmes, Z J / Holt, K / Holz, D E / Hopkins, P / Hough, J / Hourihane, S / Howell, E J / Hoy, C G / Hoyland, D / Hreibi, A / Hsu, Y / Huang, Y / Hübner, M T / Huddart, A D / Hughey, B / Hui, V / Husa, S / Huttner, S H / Huxford, R / Huynh-Dinh, T / Idzkowski, B / Iess, A / Ingram, C / Isi, M / Isleif, K / Iyer, B R / JaberianHamedan, V / Jacqmin, T / Jadhav, S J / Jadhav, S P / James, A L / Jan, A Z / Jani, K / Janquart, J / Janssens, K / Janthalur, N N / Jaranowski, P / Jariwala, D / Jaume, R / Jenkins, A C / Jenner, K / Jeunon, M / Jia, W / Johns, G R / Jones, A W / Jones, D I / Jones, J D / Jones, P / Jones, R / Jonker, R J G / Ju, L / Junker, J / Juste, V / Kalaghatgi, C V / Kalogera, V / Kamai, B / Kandhasamy, S / Kang, G / Kanner, J B / Kao, Y / Kapadia, S J / Kapasi, D P / Karat, S / Karathanasis, C / Karki, S / Kashyap, R / Kasprzack, M / Kastaun, W / Katsanevas, S / Katsavounidis, E / Katzman, W / Kaur, T / Kawabe, K / Kéfélian, F / Keitel, D / Key, J S / Khadka, S / Khalili, F Y / Khan, S / Khazanov, E A / Khetan, N / Khursheed, M / Kijbunchoo, N / Kim, C / Kim, J C / Kim, K / Kim, W S / Kim, Y-M / Kimball, C / Kinley-Hanlon, M / Kirchhoff, R / Kissel, J S / Kleybolte, L / Klimenko, S / Knee, A M / Knowles, T D / Knyazev, E / Koch, P / Koekoek, G / Koley, S / Kolitsidou, P / Kolstein, M / Komori, K / Kondrashov, V / Kontos, A / Koper, N / Korobko, M / Kovalam, M / Kozak, D B / Kringel, V / Krishnendu, N V / Królak, A / Kuehn, G / Kuei, F / Kuijer, P / Kumar, A / Kumar, P / Kumar, Rahul / Kumar, Rakesh / Kuns, K / Kuwahara, S / Lagabbe, P / Laghi, D / Lalande, E / Lam, T L / Lamberts, A / Landry, M / Lane, B B / Lang, R N / Lange, J / Lantz, B / La Rosa, I / Lartaux-Vollard, A / Lasky, P D / Laxen, M / Lazzarini, A / Lazzaro, C / Leaci, P / Leavey, S / Lecoeuche, Y K / Lee, H M / Lee, H W / Lee, J / Lee, K / Lehmann, J / Lemaître, A / Leroy, N / Letendre, N / Levesque, C / Levin, Y / Leviton, J N / Leyde, K / Li, A K Y / Li, B / Li, J / Li, T G F / Li, X / Linde, F / Linker, S D / Linley, J N / Littenberg, T B / Liu, J / Liu, K / Liu, X / Llamas, F / Llorens-Monteagudo, M / Lo, R K L / Lockwood, A / London, L T / Longo, A / Lopez, D / Portilla, M Lopez / Lorenzini, M / Loriette, V / Lormand, M / Losurdo, G / Lott, T P / Lough, J D / Lousto, C O / Lovelace, G / Lucaccioni, J F / 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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_{⊙}.

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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 ; Online: Constraining the p-Mode-g-Mode Tidal Instability with GW170817.

    Abbott, B P / Abbott, R / Abbott, T D / Acernese, F / Ackley, K / Adams, C / Adams, T / Addesso, P / Adhikari, R X / Adya, V B / Affeldt, C / Agarwal, B / Agathos, M / Agatsuma, K / Aggarwal, N / Aguiar, O D / Aiello, L / Ain, A / Ajith, P /
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    Physical review letters

    2019  Volume 122, Issue 6, Page(s) 61104

    Abstract: We analyze the impact of a proposed tidal instability coupling p modes and g modes within neutron stars on GW170817. This nonresonant instability transfers energy from the orbit of the binary to internal modes of the stars, accelerating the gravitational- ...

    Abstract We analyze the impact of a proposed tidal instability coupling p modes and g modes within neutron stars on GW170817. This nonresonant instability transfers energy from the orbit of the binary to internal modes of the stars, accelerating the gravitational-wave driven inspiral. We model the impact of this instability on the phasing of the gravitational wave signal using three parameters per star: an overall amplitude, a saturation frequency, and a spectral index. Incorporating these additional parameters, we compute the Bayes factor (lnB_{!pg}^{pg}) comparing our p-g model to a standard one. We find that the observed signal is consistent with waveform models that neglect p-g effects, with lnB_{!pg}^{pg}=0.03_{-0.58}^{+0.70} (maximum a posteriori and 90% credible region). By injecting simulated signals that do not include p-g effects and recovering them with the p-g model, we show that there is a ≃50% probability of obtaining similar lnB_{!pg}^{pg} even when p-g effects are absent. We find that the p-g amplitude for 1.4  M_{⊙} neutron stars is constrained to less than a few tenths of the theoretical maximum, with maxima a posteriori near one-tenth this maximum and p-g saturation frequency ∼70  Hz. This suggests that there are less than a few hundred excited modes, assuming they all saturate by wave breaking. For comparison, theoretical upper bounds suggest ≲10^{3} modes saturate by wave breaking. Thus, the measured constraints only rule out extreme values of the p-g parameters. They also imply that the instability dissipates ≲10^{51}  erg over the entire inspiral, i.e., less than a few percent of the energy radiated as gravitational waves.
    Language English
    Publishing date 2019-03-01
    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.122.061104
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Search for Subsolar Mass Ultracompact Binaries in Advanced LIGO's Second Observing Run.

    Abbott, B P / 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 / Aiello, L / Ain, A / Ajith, P / Allen, G / Allocca, A /
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    Physical review letters

    2019  Volume 123, Issue 16, Page(s) 161102

    Abstract: We present a search for subsolar mass ultracompact objects in data obtained during Advanced LIGO's second observing run. In contrast to a previous search of Advanced LIGO data from the first observing run, this search includes the effects of component ... ...

    Abstract We present a search for subsolar mass ultracompact objects in data obtained during Advanced LIGO's second observing run. In contrast to a previous search of Advanced LIGO data from the first observing run, this search includes the effects of component spin on the gravitational waveform. We identify no viable gravitational-wave candidates consistent with subsolar mass ultracompact binaries with at least one component between 0.2  M_{⊙}-1.0  M_{⊙}. We use the null result to constrain the binary merger rate of (0.2  M_{⊙}, 0.2  M_{⊙}) binaries to be less than 3.7×10^{5}  Gpc^{-3} yr^{-1} and the binary merger rate of (1.0  M_{⊙}, 1.0  M_{⊙}) binaries to be less than 5.2×10^{3}  Gpc^{-3} yr^{-1}. Subsolar mass ultracompact objects are not expected to form via known stellar evolution channels, though it has been suggested that primordial density fluctuations or particle dark matter with cooling mechanisms and/or nuclear interactions could form black holes with subsolar masses. Assuming a particular primordial black hole (PBH) formation model, we constrain a population of merging 0.2  M_{⊙} black holes to account for less than 16% of the dark matter density and a population of merging 1.0  M_{⊙} black holes to account for less than 2% of the dark matter density. We discuss how constraints on the merger rate and dark matter fraction may be extended to arbitrary black hole population models that predict subsolar mass binaries.
    Language English
    Publishing date 2019-11-08
    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.123.161102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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