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  1. Article ; Online: Tile-Based Two-Dimensional Phase Unwrapping for Digital Holography Using a Modular Framework.

    Antonopoulos, Georgios C / Steltner, Benjamin / Heisterkamp, Alexander / Ripken, Tammo / Meyer, Heiko

    PloS one

    2015  Volume 10, Issue 11, Page(s) e0143186

    Abstract: A variety of physical and biomedical imaging techniques, such as digital holography, interferometric synthetic aperture radar (InSAR), or magnetic resonance imaging (MRI) enable measurement of the phase of a physical quantity additionally to its ... ...

    Abstract A variety of physical and biomedical imaging techniques, such as digital holography, interferometric synthetic aperture radar (InSAR), or magnetic resonance imaging (MRI) enable measurement of the phase of a physical quantity additionally to its amplitude. However, the phase can commonly only be measured modulo 2π, as a so called wrapped phase map. Phase unwrapping is the process of obtaining the underlying physical phase map from the wrapped phase. Tile-based phase unwrapping algorithms operate by first tessellating the phase map, then unwrapping individual tiles, and finally merging them to a continuous phase map. They can be implemented computationally efficiently and are robust to noise. However, they are prone to failure in the presence of phase residues or erroneous unwraps of single tiles. We tried to overcome these shortcomings by creating novel tile unwrapping and merging algorithms as well as creating a framework that allows to combine them in modular fashion. To increase the robustness of the tile unwrapping step, we implemented a model-based algorithm that makes efficient use of linear algebra to unwrap individual tiles. Furthermore, we adapted an established pixel-based unwrapping algorithm to create a quality guided tile merger. These original algorithms as well as previously existing ones were implemented in a modular phase unwrapping C++ framework. By examining different combinations of unwrapping and merging algorithms we compared our method to existing approaches. We could show that the appropriate choice of unwrapping and merging algorithms can significantly improve the unwrapped result in the presence of phase residues and noise. Beyond that, our modular framework allows for efficient design and test of new tile-based phase unwrapping algorithms. The software developed in this study is freely available.
    MeSH term(s) Algorithms ; Holography ; Humans ; Models, Theoretical
    Language English
    Publishing date 2015-11-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0143186
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book: Türbeschläge aus Polyamid

    Steltner, Bernd

    Drücker, Griffe und Bänder

    (Die Bibliothek der Technik ; Bd. 139)

    1997  

    Author's details Bernd Steltner. [HEWI]
    Series title Die Bibliothek der Technik ; Bd. 139
    Keywords Türklinke ; Polyamide ; Türbeschlag
    Language German
    Size 70 S, Ill, 19 cm
    Publisher Verl. Moderne Industrie
    Publishing place Landsberg/Lech
    Document type Book
    ISBN 3478931533 ; 9783478931533
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  3. 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 /
    Allen, B / Allen, G / Allocca, A / Aloy, M A / Altin, P A / Amato, A / Ananyeva, A / Anderson, S B / Anderson, W G / Angelova, S V / Antier, S / Appert, S / Arai, K / Araya, M C / Areeda, J S / Arène, M / Arnaud, N / Arun, K G / Ascenzi, S / Ashton, G / Ast, M / Aston, S M / Astone, P / Atallah, D V / Aubin, F / Aufmuth, P / Aulbert, C / AultONeal, K / Austin, C / Avila-Alvarez, A / Babak, S / Bacon, P / Badaracco, F / Bader, M K M / Bae, S / Baker, P T / Baldaccini, F / Ballardin, G / Ballmer, S W / Banagiri, S / Barayoga, J C / Barclay, S E / Barish, B C / Barker, D / Barkett, K / Barnum, S / Barone, F / Barr, B / Barsotti, L / Barsuglia, M / Barta, D / Bartlett, J / Bartos, I / Bassiri, R / Basti, A / Batch, J C / Bawaj, M / Bayley, J C / Bazzan, M / Bécsy, B / Beer, C / Bejger, M / Belahcene, I / Bell, A S / Beniwal, D / Bensch, M / Berger, B K / Bergmann, G / Bernuzzi, S / Bero, J J / Berry, C P L / Bersanetti, D / Bertolini, A / Betzwieser, J / Bhandare, R / Bilenko, I A / Bilgili, S A / Billingsley, G / Billman, C R / Birch, J / Birney, R / Birnholtz, O / Biscans, S / Biscoveanu, S / Bisht, A / Bitossi, M / Bizouard, M A / Blackburn, J K / Blackman, J / Blair, C D / Blair, D G / Blair, R M / Bloemen, S / Bock, O / Bode, N / Boer, M / Boetzel, Y / Bogaert, G / Bohe, A / Bondu, F / Bonilla, E / Bonnand, R / Booker, P / Boom, B A / Booth, C D / Bork, R / Boschi, V / Bose, S / Bossie, K / Bossilkov, V / Bosveld, J / Bouffanais, Y / Bozzi, A / Bradaschia, C / Brady, P R / Bramley, A / Branchesi, M / Brau, J E / Briant, T / Brighenti, F / Brillet, A / Brinkmann, M / Brisson, V / Brockill, P / Brooks, A F / Brown, D D / Brunett, S / Buchanan, C C / Buikema, A / Bulik, T / Bulten, H J / Buonanno, A / Buskulic, D / Buy, C / Byer, R L / Cabero, M / Cadonati, L / Cagnoli, G / Cahillane, C / Calderón Bustillo, J / Callister, T A / Calloni, E / Camp, J B / Canepa, M / Canizares, P / Cannon, K C / Cao, H / Cao, J / Capano, C D / Capocasa, E / Carbognani, F / Caride, S / Carney, M F / Casanueva Diaz, J / Casentini, C / Caudill, S / Cavaglià, M / Cavalier, F / Cavalieri, R / Cella, G / Cepeda, C B / Cerdá-Durán, P / Cerretani, G / Cesarini, E / Chaibi, O / Chamberlin, S J / Chan, M / Chao, S / Charlton, P / Chase, E / Chassande-Mottin, E / Chatterjee, D / Chatziioannou, Katerina / Cheeseboro, B D / Chen, H Y / Chen, X / Chen, Y / Cheng, H-P / Chia, H Y / Chincarini, A / Chiummo, A / Chmiel, T / Cho, H S / Cho, M / Chow, J H / Christensen, N / Chu, Q / Chua, A J K / Chua, S / Chung, K W / Chung, S / Ciani, G / Ciobanu, A A / Ciolfi, R / Cipriano, F / Cirelli, C E / Cirone, A / Clara, F / Clark, J A / Clearwater, P / Cleva, F / Cocchieri, C / Coccia, E / Cohadon, P-F / Cohen, D / Colla, A / Collette, C G / Collins, C / Cominsky, L R / Constancio, M / Conti, L / Cooper, S J / Corban, P / Corbitt, T R / Cordero-Carrión, I / Corley, K R / Cornish, N / 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 / Cowan, E E / Coward, D M / Cowart, M J / Coyne, D C / Coyne, R / Creighton, J D E / Creighton, T D / Cripe, J / Crowder, S G / Cullen, T J / Cumming, A / Cunningham, L / Cuoco, E / Canton, T Dal / Dálya, G / Danilishin, S L / D'Antonio, S / Danzmann, K / Dasgupta, A / Costa, C F Da Silva / Dattilo, V / Dave, I / Davier, M / Davis, D / Daw, E J / Day, B / DeBra, D / Deenadayalan, M / Degallaix, J / De Laurentis, M / Deléglise, S / Del Pozzo, W / Demos, N / Denker, T / Dent, T / De Pietri, R / Derby, J / Dergachev, V / De Rosa, R / De Rossi, C / DeSalvo, R / de Varona, O / Dhurandhar, S / Díaz, M C / Di Fiore, L / Di Giovanni, M / Di Girolamo, T / Di Lieto, A / Ding, B / Di Pace, S / Di Palma, I / Di Renzo, F / Dmitriev, A / Doctor, Z / Dolique, V / Donovan, F / Dooley, K L / Doravari, S / Dorrington, I / Dovale Álvarez, M / Downes, T P / Drago, M / Dreissigacker, C / Driggers, J C / Du, Z / Dupej, P / Dwyer, S E / Easter, P J / Edo, T B / Edwards, M C / Effler, A / Eggenstein, H-B / Ehrens, P / Eichholz, J / Eikenberry, S S / Eisenmann, M / Eisenstein, R A / Essick, R C / Estelles, H / Estevez, D / Etienne, Z B / Etzel, T / Evans, M / Evans, T M / Fafone, V / Fair, H / Fairhurst, S / Fan, X / Farinon, S / Farr, B / Farr, W M / Fauchon-Jones, E J / Favata, M / Fays, M / Fee, C / Fehrmann, H / Feicht, J / Fejer, M M / Feng, F / Fernandez-Galiana, A / Ferrante, I / Ferreira, E C / Ferrini, F / Fidecaro, F / Fiori, I / Fiorucci, D / Fishbach, M / Fisher, R P / Fishner, J M / Fitz-Axen, M / Flaminio, R / Fletcher, M / Fong, H / Font, J A / Forsyth, P W F / Forsyth, S S / Fournier, J-D / Frasca, S / Frasconi, F / Frei, Z / Freise, A / Frey, R / Frey, V / Fritschel, P / Frolov, V V / Fulda, P / Fyffe, M / Gabbard, H A / Gadre, B U / Gaebel, S M / Gair, J R / Gammaitoni, L / Ganija, M R / Gaonkar, S G / Garcia, A / García-Quirós, C / Garufi, F / Gateley, B / Gaudio, S / Gaur, G / Gayathri, V / Gemme, G / Genin, E / Gennai, A / George, D / George, J / Gergely, L / Germain, V / Ghonge, S / Ghosh, Abhirup / Ghosh, Archisman / Ghosh, S / Giacomazzo, B / Giaime, J A / Giardina, K D / Giazotto, A / Gill, K / Giordano, G / Glover, L / Goetz, E / Goetz, R / Goncharov, B / González, G / Gonzalez Castro, J M / Gopakumar, A / Gorodetsky, M L / Gossan, S E / Gosselin, M / Gouaty, R / Grado, A / Graef, C / Granata, M / Grant, A / Gras, S / Gray, C / Greco, G / Green, A C / Green, R / Gretarsson, E M / Groot, P / Grote, H / Grunewald, S / Gruning, P / Guidi, G M / Gulati, H K / Guo, X / Gupta, A / Gupta, M K / Gushwa, K E / Gustafson, E K / Gustafson, R / Halim, O / Hall, B R / Hall, E D / Hamilton, E Z / Hamilton, H F / Hammond, G / Haney, M / Hanke, M M / Hanks, J / Hanna, C / Hannam, M D / Hannuksela, O A / Hanson, J / Hardwick, T / Harms, J / Harry, G M / Harry, I W / Hart, M J / Haster, C-J / Haughian, K / Healy, J / Heidmann, A / Heintze, M C / Heitmann, H / Hello, P / Hemming, G / Hendry, M / Heng, I S / Hennig, J / Heptonstall, A W / Hernandez, F J / Heurs, M / Hild, S / Hinderer, T / Hoak, D / Hochheim, S / Hofman, D / Holland, N A / Holt, K / Holz, D E / Hopkins, P / Horst, C / Hough, J / Houston, E A / Howell, E J / Hreibi, A / Huerta, E A / Huet, D / Hughey, B / Hulko, M / Husa, S / Huttner, S H / Huynh-Dinh, T / Iess, A / Indik, N / Ingram, C / Inta, R / Intini, G / Isa, H N / Isac, J-M / Isi, M / Iyer, B R / Izumi, K / Jacqmin, T / Jani, K / Jaranowski, P / Johnson, D S / Johnson, W W / Jones, D I / 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 / Karvinen, K S / Kasprzack, M / Katolik, M / Katsanevas, S / Katsavounidis, E / Katzman, W / Kaufer, S / Kawabe, K / Keerthana, N V / Kéfélian, F / Keitel, D / Kemball, A J / Kennedy, R / Key, J S / Khalili, F Y / Khamesra, B / Khan, H / Khan, I / Khan, S / Khan, Z / Khazanov, E A / Kijbunchoo, N / Kim, Chunglee / Kim, J C / Kim, K / Kim, W / Kim, W S / Kim, Y-M / King, E J / King, P J / Kinley-Hanlon, M / Kirchhoff, R / Kissel, J S / Kleybolte, L / Klimenko, S / Knowles, T D / Koch, P / Koehlenbeck, S M / Koley, S / Kondrashov, V / Kontos, A / Korobko, M / Korth, W Z / Kowalska, I / Kozak, D B / Krämer, C / Kringel, V / Krishnan, B / Królak, A / Kuehn, G / Kumar, P / Kumar, R / Kumar, S / Kuo, L / Kutynia, A / Kwang, S / Lackey, B D / Lai, K H / Landry, M / Lang, R N / Lange, J / Lantz, B / Lanza, R K / Lartaux-Vollard, A / Lasky, P D / Laxen, M / Lazzarini, A / Lazzaro, C / Leaci, P / Leavey, S / Lee, C H / Lee, H K / Lee, H M / Lee, H W / Lee, K / Lehmann, J / Lenon, A / Leonardi, M / Leroy, N / Letendre, N / Levin, Y / Li, J / Li, T G F / Li, X / Linker, S D / Littenberg, T B / Liu, J / Liu, X / Lo, R K L / Lockerbie, N A / London, L T / Longo, A / Lorenzini, M / Loriette, V / Lormand, M / Losurdo, G / Lough, J D / Lovelace, G / Lück, H / Lumaca, D / Lundgren, A P / Lynch, R / Ma, Y / Macas, R / Macfoy, S / Machenschalk, B / MacInnis, M / Macleod, D M / Magaña Hernandez, I / Magaña-Sandoval, F / Magaña Zertuche, L / Magee, R M / Majorana, E / Maksimovic, I / Man, N / Mandic, V / Mangano, V / Mansell, G L / Manske, M / Mantovani, M / Marchesoni, F / Marion, F / Márka, S / Márka, Z / Markakis, C / Markosyan, A S / Markowitz, A / Maros, E / Marquina, A / Martelli, F / Martellini, L / Martin, I W / Martin, R M / Martynov, D V / Mason, K / Massera, E / Masserot, A / Massinger, T J / Masso-Reid, M / Mastrogiovanni, S / Matas, A / Matichard, F / Matone, L / Mavalvala, N / Mazumder, N / McCann, J J / McCarthy, R / McClelland, D E / McCormick, S / McCuller, L / McGuire, S C / McIver, J / McManus, D J / McRae, T / McWilliams, S T / Meacher, D / Meadors, G D / Mehmet, M / Meidam, J / Mejuto-Villa, E / Melatos, A / Mendell, G / Mendoza-Gandara, D / Mercer, R A / Mereni, L / Merilh, E L / Merzougui, M / Meshkov, S / Messenger, C / Messick, C / Metzdorff, R / Meyers, P M / Miao, H / Michel, C / 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/ Oppermann, P / Oram, Richard J / O'Reilly, B / Ormiston, R / Ortega, L F / O'Shaughnessy, R / Ossokine, S / Ottaway, D J / Overmier, H / Owen, B J / Pace, A E / Pagano, G / Page, J / Page, M A / Pai, A / Pai, S A / Palamos, J R / Palashov, O / Palomba, C / Pal-Singh, A / Pan, Howard / Pan, Huang-Wei / Pang, B / Pang, P T H / Pankow, C / Pannarale, F / Pant, B C / Paoletti, F / Paoli, A / Papa, M A / Parida, A / Parker, W / Pascucci, D / Pasqualetti, A / Passaquieti, R / Passuello, D / Patil, M / Patricelli, B / Pearlstone, B L / Pedersen, C / Pedraza, M / Pedurand, R / Pekowsky, L / Pele, A / Penn, S / Perez, C J / Perreca, A / Perri, L M / Pfeiffer, H P / Phelps, M / Phukon, K S / Piccinni, O J / Pichot, M / Piergiovanni, F / Pierro, V / Pillant, G / Pinard, L / Pinto, I M / Pirello, M / Pitkin, M / Poggiani, R / Popolizio, P / Porter, E K / Possenti, L / Post, A / Powell, J / Prasad, J / Pratt, J W W / Pratten, G / Predoi, V / Prestegard, T / Principe, M / Privitera, S / Prodi, G A / Prokhorov, L G / Puncken, O / Punturo, M / Puppo, P / Pürrer, M / Qi, H / Quetschke, V / Quintero, E A / Quitzow-James, R / Rabeling, D S / Radkins, H / Raffai, P / Raja, S / Rajan, C / Rajbhandari, B / Rakhmanov, M / Ramirez, K E / Ramos-Buades, A / Rana, Javed / Rapagnani, P / Raymond, V / Razzano, M / Read, J / Regimbau, T / Rei, L / Reid, S / Reitze, D H / Ren, W / Ricci, F / Ricker, P M / Riles, K / Rizzo, M / Robertson, N A / Robie, R / Robinet, F / Robson, T / Rocchi, A / Rolland, L / Rollins, J G / Roma, V J / Romano, R / Romel, C L / Romie, J H / Rosińska, D / Ross, M P / Rowan, S / Rüdiger, A / Ruggi, P / Rutins, G / Ryan, K / Sachdev, S / Sadecki, T / Sakellariadou, M / Salconi, L / Saleem, M / Salemi, F / Samajdar, A / Sammut, L / Sampson, L M / Sanchez, E J / Sanchez, L E / Sanchis-Gual, N / Sandberg, V / Sanders, J R / Sarin, N / Sassolas, B / Saulson, P R / Sauter, O / Savage, R L / Sawadsky, A / Schale, P / Scheel, M / Scheuer, J / Schmidt, P / Schnabel, R / Schofield, R M S / Schönbeck, A / Schreiber, E / Schuette, D / Schulte, B W / Schutz, B F / Schwalbe, S G / Scott, J / Scott, S M / Seidel, E / Sellers, D / Sengupta, A S / Sentenac, D / Sequino, V / Sergeev, A / Setyawati, Y / Shaddock, D A / Shaffer, T J / Shah, A A / Shahriar, M S / Shaner, M B / Shao, L / Shapiro, B / Shawhan, P / Shen, H / Shoemaker, D H / Shoemaker, D M / Siellez, K / Siemens, X / Sieniawska, M / Sigg, D / Silva, A D / Singer, L P / Singh, A / Singhal, A / Sintes, A M / Slagmolen, B J J / Slaven-Blair, T J / Smith, B / Smith, J R / Smith, R J E / Somala, S / Son, E J / Sorazu, B / Sorrentino, F / Souradeep, T / Spencer, A P / Srivastava, A K / Staats, K / Steinke, M / Steinlechner, J / Steinlechner, S / Steinmeyer, D / Steltner, B / Stevenson, S P / Stocks, D / Stone, R / Stops, D J / Strain, K A / Stratta, G / Strigin, S E / Strunk, A / Sturani, R / Stuver, A L / Summerscales, T Z / Sun, L / Sunil, S / Suresh, J / Sutton, P J / Swinkels, B L / Szczepańczyk, M J 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Vorvick, C / Vyatchanin, S P / Wade, A R / Wade, L E / Wade, M / Walet, R / Walker, M / Wallace, L / Walsh, S / Wang, G / Wang, H / Wang, J Z / Wang, W H / Wang, Y F / Ward, R L / Warner, J / Was, M / Watchi, J / Weaver, B / Wei, L-W / Weinert, M / Weinstein, A J / Weiss, R / Wellmann, F / Wen, L / Wessel, E K / Weßels, P / Westerweck, J / Wette, K / Whelan, J T / Whiting, B F / Whittle, C / Wilken, D / Williams, D / Williams, R D / Williamson, A R / Willis, J L / Willke, B / Wimmer, M H / Winkler, W / Wipf, C C / Wittel, H / Woan, G / Woehler, J / Wofford, J K / Wong, W K / Worden, J / Wright, J L / Wu, D S / Wysocki, D M / Xiao, S / Yam, W / Yamamoto, H / Yancey, C C / Yang, L / Yap, M J / Yazback, M / Yu, Hang / Yu, Haocun / Yvert, M / Zadrożny, A / Zanolin, M / Zelenova, T / Zendri, J-P / Zevin, M / Zhang, J / Zhang, L / Zhang, M / Zhang, T / Zhang, Y-H / Zhao, C / Zhou, M / Zhou, Z / Zhu, S J / Zhu, X J / Zimmerman, A B / Zucker, M E / Zweizig, J / Weinberg, N N

    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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  4. Article ; Online: GW170817: Measurements of Neutron Star Radii and Equation of State.

    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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Lundgren, A P / Lynch, R / Ma, Y / Macas, R / Macfoy, S / Machenschalk, B / MacInnis, M / Macleod, D M / Magaña Hernandez, I / Magaña-Sandoval, F / Magaña Zertuche, L / Magee, R M / Majorana, E / Maksimovic, I / Man, N / Mandic, V / Mangano, V / Mansell, G L / Manske, M / Mantovani, M / Marchesoni, F / Marion, F / Márka, S / Márka, Z / Markakis, C / Markosyan, A S / Markowitz, A / Maros, E / Marquina, A / Martelli, F / Martellini, L / Martin, I W / Martin, R M / Martynov, D V / Mason, K / Massera, E / Masserot, A / Massinger, T J / Masso-Reid, M / Mastrogiovanni, S / Matas, A / Matichard, F / Matone, L / Mavalvala, N / Mazumder, N / McCann, J J / McCarthy, R / McClelland, D E / McCormick, S / McCuller, L / McGuire, S C / McIver, J / McManus, D J / McRae, T / McWilliams, S T / Meacher, D / Meadors, G D / Mehmet, M / Meidam, J / Mejuto-Villa, E / Melatos, A / Mendell, G / Mendoza-Gandara, D / Mercer, R A / Mereni, L / Merilh, E L / Merzougui, M / Meshkov, S / Messenger, C / Messick, C / 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Zhao, C / Zhou, M / Zhou, Z / Zhu, S J / Zhu, X J / Zimmerman, A B / Zlochower, Y / Zucker, M E / Zweizig, J

    Physical review letters

    2018  Volume 121, Issue 16, Page(s) 161101

    Abstract: On 17 August 2017, the LIGO and Virgo observatories made the first direct detection of gravitational waves from the coalescence of a neutron star binary system. The detection of this gravitational-wave signal, GW170817, offers a novel opportunity to ... ...

    Abstract On 17 August 2017, the LIGO and Virgo observatories made the first direct detection of gravitational waves from the coalescence of a neutron star binary system. The detection of this gravitational-wave signal, GW170817, offers a novel opportunity to directly probe the properties of matter at the extreme conditions found in the interior of these stars. The initial, minimal-assumption analysis of the LIGO and Virgo data placed constraints on the tidal effects of the coalescing bodies, which were then translated to constraints on neutron star radii. Here, we expand upon previous analyses by working under the hypothesis that both bodies were neutron stars that are described by the same equation of state and have spins within the range observed in Galactic binary neutron stars. Our analysis employs two methods: the use of equation-of-state-insensitive relations between various macroscopic properties of the neutron stars and the use of an efficient parametrization of the defining function p(ρ) of the equation of state itself. From the LIGO and Virgo data alone and the first method, we measure the two neutron star radii as R_{1}=10.8_{-1.7}^{+2.0}  km for the heavier star and R_{2}=10.7_{-1.5}^{+2.1}  km for the lighter star at the 90% credible level. If we additionally require that the equation of state supports neutron stars with masses larger than 1.97  M_{⊙} as required from electromagnetic observations and employ the equation-of-state parametrization, we further constrain R_{1}=11.9_{-1.4}^{+1.4}  km and R_{2}=11.9_{-1.4}^{+1.4}  km at the 90% credible level. Finally, we obtain constraints on p(ρ) at supranuclear densities, with pressure at twice nuclear saturation density measured at 3.5_{-1.7}^{+2.7}×10^{34}  dyn cm^{-2} at the 90% level.
    Language English
    Publishing date 2018-11-02
    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.121.161101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Search for Subsolar-Mass Ultracompact Binaries in Advanced LIGO's First Observing Run.

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    Physical review letters

    2018  Volume 121, Issue 23, Page(s) 231103

    Abstract: We present the first Advanced LIGO and Advanced Virgo search for ultracompact binary systems with component masses between 0.2  M_{⊙}-1.0  M_{⊙} using data taken between September 12, 2015 and January 19, 2016. We find no viable gravitational wave ... ...

    Abstract We present the first Advanced LIGO and Advanced Virgo search for ultracompact binary systems with component masses between 0.2  M_{⊙}-1.0  M_{⊙} using data taken between September 12, 2015 and January 19, 2016. We find no viable gravitational wave candidates. Our null result constrains the coalescence rate of monochromatic (delta function) distributions of nonspinning (0.2  M_{⊙}, 0.2  M_{⊙}) ultracompact binaries to be less than 1.0×10^{6}  Gpc^{-3}  yr^{-1} and the coalescence rate of a similar distribution of (1.0  M_{⊙}, 1.0  M_{⊙}) ultracompact binaries to be less than 1.9×10^{4}  Gpc^{-3}  yr^{-1} (at 90% confidence). Neither black holes nor neutron stars are expected to form below ∼1  M_{⊙} through conventional stellar evolution, though it has been proposed that similarly low mass black holes could be formed primordially through density fluctuations in the early Universe and contribute to the dark matter density. The interpretation of our constraints in the primordial black hole dark matter paradigm is highly model dependent; however, under a particular primordial black hole binary formation scenario we constrain monochromatic primordial black hole populations of 0.2  M_{⊙} to be less than 33% of the total dark matter density and monochromatic populations of 1.0  M_{⊙} to be less than 5% of the dark matter density. The latter strengthens the presently placed bounds from microlensing surveys of massive compact halo objects (MACHOs) provided by the MACHO and EROS Collaborations.
    Language English
    Publishing date 2018-12-21
    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.121.231103
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Tests of General Relativity with GW170817.

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Zhou, M / Zhou, Z / Zhu, S J / Zhu, X J / Zimmerman, A B / Zucker, M E / Zweizig, J

    Physical review letters

    2015  Volume 123, Issue 1, Page(s) 11102

    Abstract: The recent discovery by Advanced LIGO and Advanced Virgo of a gravitational wave signal from a binary neutron star inspiral has enabled tests of general relativity (GR) with this new type of source. This source, for the first time, permits tests of ... ...

    Abstract The recent discovery by Advanced LIGO and Advanced Virgo of a gravitational wave signal from a binary neutron star inspiral has enabled tests of general relativity (GR) with this new type of source. This source, for the first time, permits tests of strong-field dynamics of compact binaries in the presence of matter. In this Letter, we place constraints on the dipole radiation and possible deviations from GR in the post-Newtonian coefficients that govern the inspiral regime. Bounds on modified dispersion of gravitational waves are obtained; in combination with information from the observed electromagnetic counterpart we can also constrain effects due to large extra dimensions. Finally, the polarization content of the gravitational wave signal is studied. The results of all tests performed here show good agreement with GR.
    Language English
    Publishing date 2015-09-30
    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.123.011102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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