Results 11 to 20 of about 2,849,050 (231)

Search for an Isotropic Gravitational-wave Background with the Parkes Pulsar Timing Array [PDF]

Astrophysical Journal Letters, 2023
Pulsar timing arrays aim to detect nanohertz-frequency gravitational waves (GWs). A background of GWs modulates pulsar arrival times and manifests as a stochastic process, common to all pulsars, with a signature spatial correlation.
D. Reardon, A. Zic, R. Shannon, G. Hobbs, M. Bailes, V. Di Marco, A. Kapur, Axl F. Rogers, E. Thrane, Jacob Askew, N. Bhat, A. Cameron, M. Curyło, W. Coles, S. Dai, B. Goncharov, M. Kerr, Atharva Kulkarni, Y. Levin, M. Lower, R. Manchester, R. Mandow, M. Miles, R. Nathan, S. Osłowski, C. Russell, R. Spiewak, Songbo Zhang, Xingjiang Zhu   +28 more
semanticscholar   +1 more source

Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I [PDF]

Research in Astronomy and Astrophysics, 2023
Observing and timing a group of millisecond pulsars with high rotational stability enables the direct detection of gravitational waves (GWs). The GW signals can be identified from the spatial correlations encoded in the times-of-arrival of widely spaced ...
Heng Xu, Siyuan Chen, Yanjun Guo, Jinchen Jiang, Bojun Wang, Jiangwei Xu, Zihan Xue, R. Nicolas Caballero, Jian-ping Yuan, Yonghua Xu, Jingbo Wang, L. Hao, Jing Luo, Kejia Lee, Jinlin Han, P. Jiang, Zhiqiang Shen, Min Wang, Na Wang, Renxin Xu, X. Wu, R. Manchester, L. Qian, X. Guan, Menglin Huang, Chun Sun, Yan Zhu   +26 more
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The second data release from the European Pulsar Timing Array. III. Search for gravitational wave signals [PDF]

Astronomy & Astrophysics, 2023
We present the results of the search for an isotropic stochastic gravitational wave background (GWB) at nanohertz frequencies using the second data release of the European Pulsar Timing Array (EPTA) for 25 millisecond pulsars and a combination with the ...
J. Antoniadis, P. Arumugam, S. Arumugam, S. Babak, M. Bagchi, A. B. Nielsen, C. Bassa, A. Bathula, A. Berthereau, M. Bonetti, E. Bortolas, P. Brook, M. Burgay, R. N. Caballero, A. Chalumeau, D. Champion, S. Chanlaridis, S. Chen, I. Cognard, S. Dandapat, D. Deb, S. Desai, G. Desvignes, N. Dhanda-Batra, C. Dwivedi, M. Falxa, R. Ferdman, A. Franchini, J. Gair, B. Goncharov, A. Gopakumar, E. Graikou, J. Grießmeier, L. Guillemot, Y. J. Guo, Y. Gupta, S. Hisano, H. Hu, F. Iraci, D. Izquierdo-Villalba, J. Jang, J. Jawor, G. Janssen, A. Jessner, B. C. Joshi, Fazal Kareem, R. Karuppusamy, E. Keane, M. Keith, D. Kharbanda, T. Kikunaga, N. Kolhe, M. Kramer, M. A. Krishnakumar, K. Lackeos, K. Lee, K. Liu, Y. Liu, A. Lyne, J. Mckee, Y. Maan, R. Main, M. Mickaliger, I. C. Niţu, K. Nobleson, A. K. Paladi, A. Parthasarathy, B. Perera, D. Perrodin, A. Petiteau, N. Porayko, A. Possenti, T. Prabu, H. Q. Leclere, P. Rana, A. Samajdar, S. Sanidas, A. Sesana, G. Shaifullah, J. Singha, L. Speri, R. Spiewak, A. Srivastava, B. Stappers, M. Surnis, S. Susarla, A. Susobhanan, K. Takahashi, P. Tarafdar, G. Theureau, C. Tiburzi, E. V. D. Wateren, A. Vecchio, V. V. Krishnan, J. Verbiest, J. Wang, L. Wang, Z. Wu   +97 more
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The NANOGrav 15 yr Data Set: Constraints on Supermassive Black Hole Binaries from the Gravitational-wave Background [PDF]

Astrophysical Journal Letters, 2023
The NANOGrav 15 yr data set shows evidence for the presence of a low-frequency gravitational-wave background (GWB). While many physical processes can source such low-frequency gravitational waves, here we analyze the signal as coming from a population of
G. Agazie, A. Anumarlapudi, A. Archibald, P. Baker, B. B'ecsy, L. Blecha, Alexander Bonilla, A. Brazier, P. Brook, S. Burke-Spolaor, R. Burnette, R. Case, J. Casey-Clyde, M. Charisi, S. Chatterjee, K. Chatziioannou, B. Cheeseboro, Siyuan Chen, T. Cohen, J. Cordes, N. Cornish, F. Crawford, H. Cromartie, K. Crowter, C. Cutler, D. D’Orazio, M. DeCesar, D. DeGan, P. Demorest, Heling Deng, T. Dolch, B. Drachler, E. Ferrara, W. Fiore, E. Fonseca, G. Freedman, E. Gardiner, N. Garver-Daniels, P. Gentile, K. Gersbach, J. Glaser, D. Good, K. Gultekin, J. Hazboun, S. Hourihane, K. Islo, R. Jennings, A. Johnson, Megan L. Jones, A. Kaiser, D. Kaplan, L. Kelley, M. Kerr, J. Key, N. Laal, M. Lam, W. Lamb, T. Lazio, N. Lewandowska, T. Littenberg, Tianyu Liu, Jing Luo, R. Lynch, Chung-Pei Ma, D. Madison, A. McEwen, J. Mckee, M. Mclaughlin, N. McMann, B. Meyers, P. Meyers, C. Mingarelli, A. Mitridate, P. Natarajan, C. Ng, D. Nice, S. Ocker, K. Olum, T. Pennucci, B. Perera, P. Petrov, N. Pol, H. Radovan, S. Ransom, P. Ray, J. Romano, J. Runnoe, S. Sardesai, A. Schmiedekamp, C. Schmiedekamp, K. Schmitz, L. Schult, B. Shapiro-Albert, X. Siemens, J. Simon, M. Siwek, I. Stairs, D. Stinebring, K. Stovall, Jerry P. Sun, A. Susobhanan, J. Swiggum, Jacob M. Taylor, S. Taylor, J. Turner, C. Unal, M. Vallisneri, S. Vigeland, Jeremy M. Wachter, H. Wahl, Qiaohong Wang, C. Witt, David Wright, O. Young   +113 more
semanticscholar   +1 more source

Scalar-induced gravitational wave interpretation of PTA data: the role of scalar fluctuation propagation speed [PDF]

Journal of Cosmology and Astroparticle Physics, 2023
Pulsar timing arrays gathered evidence of the presence of a gravitational wave background around nHz frequencies. If the gravitational wave background was induced by large and Gaussian primordial fluctuations, they would then produce too many sub-solar ...
S. Balaji, Guillem Domènech, G. Franciolini   +2 more
semanticscholar   +1 more source

Review of the Advanced LIGO Gravitational Wave Observatories Leading to Observing Run Four [PDF]

Galaxies, 2022
Gravitational waves from binary black hole and neutron star mergers are being regularly detected. As of 2021, 90 confident gravitational wave detections have been made by the LIGO and Virgo detectors.
C. Cahillane, G. Mansell
semanticscholar   +1 more source

On the Evidence for a Common-spectrum Process in the Search for the Nanohertz Gravitational-wave Background with the Parkes Pulsar Timing Array [PDF]

, 2021
A nanohertz-frequency stochastic gravitational-wave background can potentially be detected through the precise timing of an array of millisecond pulsars.
B. Goncharov, R. Shannon, D. Reardon, G. Hobbs, A. Zic, M. Bailes, M. Curyło, S. Dai, M. Kerr, M. Lower, R. Manchester, R. Mandow, H. Middleton, M. Miles, A. Parthasarathy, E. Thrane, N. Thyagarajan, X. Xue, X.-J. Zhu, A. Cameron, Y. Feng, R. Luo, C. Russell, J. Sarkissian, R. Spiewak, S. Wang, J. Wang, L. Zhang, S. Zhang   +28 more
semanticscholar   +1 more source

The NANOGrav 12.5 yr Data Set: Search for an Isotropic Stochastic Gravitational-wave Background [PDF]

Astrophysical Journal Letters, 2020
We search for an isotropic stochastic gravitational-wave background (GWB) in the 12.5 yr pulsar-timing data set collected by the North American Nanohertz Observatory for Gravitational Waves.
Z. Arzoumanian, P. Baker, Harsha Blumer, B. Bécsy, A. Brazier, P. Brook, S. Burke-Spolaor, S. Chatterjee, Siyuan Chen, J. Cordes, N. Cornish, F. Crawford, H. Cromartie, M. DeCesar, P. Demorest, T. Dolch, J. Ellis, E. Ferrara, W. Fiore, E. Fonseca, N. Garver-Daniels, P. Gentile, D. Good, J. Hazboun, A. M. Holgado, K. Islo, R. Jennings, Megan L. Jones, A. Kaiser, D. Kaplan, L. Kelley, J. Key, N. Laal, M. Lam, T. Joseph W. Lazio, D. Lorimer, Jing Luo, R. Lynch, D. Madison, M. Mclaughlin, C. Mingarelli, C. Ng, D. Nice, T. Pennucci, N. Pol, S. Ransom, P. Ray, B. Shapiro-Albert, X. Siemens, J. Simon, R. Spiewak, I. Stairs, D. Stinebring, K. Stovall, Jerry P. Sun, J. Swiggum, S. Taylor, J. Turner, M. Vallisneri, S. Vigeland, C. Witt   +60 more
semanticscholar   +1 more source

Real-time gravitational-wave science with neural posterior estimation [PDF]

Physical Review Letters, 2021
We demonstrate unprecedented accuracy for rapid gravitational wave parameter estimation with deep learning. Using neural networks as surrogates for Bayesian posterior distributions, we analyze eight gravitational wave events from the first LIGO-Virgo ...
Maximilian Dax, Stephen R. Green, J. Gair, J. Macke, A. Buonanno, B. Scholkopf   +5 more
semanticscholar   +1 more source

Black holes in galaxies: Environmental impact on gravitational-wave generation and propagation [PDF]

Physical Review D, 2021
We introduce a family of solutions of Einstein's gravity minimally coupled to an anisotropic fluid, describing asymptotically flat black holes with"hair"and a regular horizon.
V. Cardoso, K. Destounis, F. Duque, R. Macedo, A. Maselli   +4 more
semanticscholar   +1 more source