Authors
Gabriella Agazie, Akash Anumarlapudi, Anne M Archibald, Paul T Baker, Bence Bécsy, Laura Blecha, Alexander Bonilla, Adam Brazier, Paul R Brook, Sarah Burke-Spolaor, Rand Burnette, Robin Case, J Andrew Casey-Clyde, Maria Charisi, Shami Chatterjee, Katerina Chatziioannou, Belinda D Cheeseboro, Siyuan Chen, Tyler Cohen, James M Cordes, Neil J Cornish, Fronefield Crawford, H Thankful Cromartie, Kathryn Crowter, Curt J Cutler, Daniel J D’Orazio, Megan E DeCesar, Dallas DeGan, Paul B Demorest, Heling Deng, Timothy Dolch, Brendan Drachler, Elizabeth C Ferrara, William Fiore, Emmanuel Fonseca, Gabriel E Freedman, Emiko Gardiner, Nate Garver-Daniels, Peter A Gentile, Kyle A Gersbach, Joseph Glaser, Deborah C Good, Kayhan Gültekin, Jeffrey S Hazboun, Sophie Hourihane, Kristina Islo, Ross J Jennings, Aaron Johnson, Megan L Jones, Andrew R Kaiser, David L Kaplan, Luke Zoltan Kelley, Matthew Kerr, Joey S Key, Nima Laal, Michael T Lam, William G Lamb, T Joseph W Lazio, Natalia Lewandowska, Tyson B Littenberg, Tingting Liu, Jing Luo, Ryan S Lynch, Chung-Pei Ma, Dustin R Madison, Alexander McEwen, James W McKee, Maura A McLaughlin, Natasha McMann, Bradley W Meyers, Patrick M Meyers, Chiara MF Mingarelli, Andrea Mitridate, Priyamvada Natarajan, Cherry Ng, David J Nice, Stella Koch Ocker, Ken D Olum, Timothy T Pennucci, Benetge BP Perera, Polina Petrov, Nihan S Pol, Henri A Radovan, Scott M Ransom, Paul S Ray, Joseph D Romano, Jessie C Runnoe, Shashwat C Sardesai, Ann Schmiedekamp, Carl Schmiedekamp, Kai Schmitz, Levi Schult, Brent J Shapiro-Albert, Xavier Siemens, Joseph Simon, Magdalena S Siwek, Ingrid H Stairs, Daniel R Stinebring, Kevin Stovall, Jerry P Sun, Abhimanyu Susobhanan, Joseph K Swiggum, Jacob Taylor, Stephen R Taylor, Jacob E Turner, Caner Unal, Michele Vallisneri, Sarah J Vigeland, Jeremy M Wachter, Haley M Wahl, Qiaohong Wang, Caitlin A Witt, David Wright, Olivia Young, NANOGrav Collaboration
Publication date
2023/8/1
Journal
The Astrophysical Journal Letters
Volume
952
Issue
2
Pages
L37
Publisher
IOP Publishing
Description
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 supermassive black hole (SMBH) binaries distributed throughout the Universe. We show that astrophysically motivated models of SMBH binary populations are able to reproduce both the amplitude and shape of the observed low-frequency gravitational-wave spectrum. While multiple model variations are able to reproduce the GWB spectrum at our current measurement precision, our results highlight the importance of accurately modeling binary evolution for producing realistic GWB spectra. Additionally, while reasonable parameters are able to reproduce the 15 yr observations, the implied GWB amplitude necessitates either a large number of …
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Scholar articles
G Agazie, A Anumarlapudi, AM Archibald, PT Baker… - The Astrophysical Journal Letters, 2023