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Related papers: The NANOGrav 15-year Data Set: Search for Signals …
200 papers
The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) collaboration has recently reported strong evidence for a signal at nanohertz, potentially the first detection of the stochastic gravitational-wave background…
The NANOGrav 15-year 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…
High Energy Astrophysical Phenomena · Physics
2023-08-09
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 M. F. Mingarelli , Andrea Mitridate , Priyamvada Natarajan , Cherry Ng , David J. Nice , Stella Koch Ocker , Ken D. Olum , Timothy T. Pennucci , Benetge B. P. 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
We search for an isotropic stochastic gravitational-wave background (GWB) in the newly released $11$-year dataset from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). While we find no significant evidence for a…
High Energy Astrophysical Phenomena · Physics
2018-06-11
Z. Arzoumanian , P. T. Baker , A. Brazier , S. Burke-Spolaor , S. J. Chamberlin , S. Chatterjee , B. Christy , J. M. Cordes , N. J. Cornish , F. Crawford , H. Thankful Cromartie , K. Crowter , M. DeCesar , P. B. Demorest , T. Dolch , J. A. Ellis , R. D. Ferdman , E. Ferrara , W. M. Folkner , E. Fonseca , N. Garver-Daniels , P. A. Gentile , R. Haas , J. S. Hazboun , E. A. Huerta , K. Islo , G. Jones , M. L. Jones , D. L. Kaplan , V. M. Kaspi , M. T. Lam , T. J. W. Lazio , L. Levin , A. N. Lommen , D. R. Lorimer , J. Luo , R. S. Lynch , D. R. Madison , M. A. McLaughlin , S. T. McWilliams , C. M. F. Mingarelli , C. Ng , D. J. Nice , R. S. Park , T. T. Pennucci , N. S. Pol , S. M. Ransom , P. S. Ray , A. Rasskazov , X. Siemens , J. Simon , R. Spiewak , I. H. Stairs , D. R. Stinebring , K. Stovall , J. Swiggum , S. R. Taylor , M. Vallisneri , S. Vigeland , W. W. Zhu
Significant evidence for a stochastic gravitational-wave background has recently been reported by several Pulsar Timing Array observations. These studies have shown that, in addition to astrophysical explanations based on supermassive black…
NANOGrav, EPTA, PPTA, and CPTA have announced the evidence for a stochastic signal from their latest data sets. Supermassive black hole binaries (SMBHBs) are supposed to be the most promising gravitational-wave (GW) sources of pulsar timing…
Cosmology and Nongalactic Astrophysics · Physics
2023-11-16
Yan-Chen Bi , Yu-Mei Wu , Zu-Cheng Chen , Qing-Guo Huang
The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has reported evidence for the presence of an isotropic nanohertz gravitational wave background (GWB) in its 15 yr dataset. However, if the GWB is produced by a…
High Energy Astrophysical Phenomena · Physics
2023-06-30
Gabriella Agazie , Akash Anumarlapudi , Anne M. Archibald , Zaven Arzoumanian , Paul T. Baker , Bence Bécsy , Laura Blecha , Adam Brazier , Paul R. Brook , Sarah Burke-Spolaor , J. Andrew Casey-Clyde , Maria Charisi , Shami Chatterjee , Tyler Cohen , James M. Cordes , Neil J. Cornish , Fronefield Crawford , H. Thankful Cromartie , Kathryn Crowter , Megan E. DeCesar , Paul B. Demorest , Timothy Dolch , Brendan Drachler , Elizabeth C. Ferrara , William Fiore , Emmanuel Fonseca , Gabriel E. Freedman , Emiko Gardiner , Nate Garver-Daniels , Peter A. Gentile , Joseph Glaser , Deborah C. Good , Kayhan Gültekin , Jeffrey S. Hazboun , Ross J. Jennings , Aaron D. 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 , Tingting Liu , Duncan R. Lorimer , Jing Luo , Ryan S. Lynch , Chung-Pei Ma , Dustin R. Madison , Alexander McEwen , James W. McKee , Maura A. McLaughlin , Natasha McMann , Bradley W. Meyers , Chiara M. F. Mingarelli , Andrea Mitridate , Cherry Ng , David J. Nice , Stella Koch Ocker , Ken D. Olum , Timothy T. Pennucci , Benetge B. P. Perera , Nihan S. Pol , Henri A. Radovan , Scott M. Ransom , Paul S. Ray , Joseph D. Romano , 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 , Abhimanyu Susobhanan , Joseph K. Swiggum , Stephen R. Taylor , Jacob E. Turner , Caner Unal , Michele Vallisneri , Sarah J. Vigeland , Haley M. Wahl , Caitlin A. Witt , Olivia Young
Observations indicate that nearly all galaxies contain supermassive black holes (SMBHs) at their centers. When galaxies merge, their component black holes form SMBH binaries (SMBHBs), which emit low-frequency gravitational waves (GWs) that…
Astrophysics of Galaxies · Physics
2019-09-30
K. Aggarwal , Z. Arzoumanian , P. T. Baker , A. Brazier , M. R. Brinson , P. R. Brook , S. Burke-Spolaor , S. Chatterjee , J. M. Cordes , N. J. Cornish , F. Crawford , K. Crowter , H. T. Cromartie , M. DeCesar , P. B. Demorest , T. Dolch , J. A. Ellis , R. D. Ferdman , E. Ferrara , E. Fonseca , N. Garver-Daniels , P. Gentile , J. S. Hazboun , A. M. Holgado , E. A. Huerta , K. Islo , R. Jennings , G. Jones , M. L. Jones , A. R. Kaiser , D. L. Kaplan , L. Z. Kelley , J. S. Key , M. T. Lam , T. J. W. Lazio , L. Levin , D. R. Lorimer , J. Luo , R. S. Lynch , D. R. Madison , M. A. McLaughlin , S. T. McWilliams , C. M. F. Mingarelli , C. Ng , D. J. Nice , T. T. Pennucci , N. S. Pol , S. M. Ransom , P. S. Ray , X. Siemens , J. Simon , R. Spiewak , I. H. Stairs , D. R. Stinebring , K. Stovall , J. Swiggum , S. R. Taylor , J. E. Turner , M. Vallisneri , R. van Haasteren , S. J. Vigeland , C. A. Witt , W. W. Zhu
The mergers of supermassive black hole binaries (SMBHBs) promise to be incredible sources of gravitational waves (GWs). While the oscillatory part of the merger gravitational waveform will be outside the frequency sensitivity range of…
High Energy Astrophysical Phenomena · Physics
2020-02-05
K. Aggarwal , Z. Arzoumanian , P. T. Baker , A. Brazier , P. R. Brook , S. Burke-Spolaor , S. Chatterjee , J. M. Cordes , N. J. Cornish , F. Crawford , H. T. Cromartie , K. Crowter , M. Decesar , P. B. Demorest , T. Dolch , J. A. Ellis , R. D. Ferdman , E. C. Ferrara , E. Fonseca , N. Garver-Daniels , P. Gentile , D. Good , J. S. Hazboun , A. M. Holgado , E. A. Huerta , K. Islo , R. Jennings , G. Jones , M. L. Jones , D. L. Kaplan , L. Z. Kelley , J. S. Key , M. T. Lam , T. J. W. Lazio , L. Levin , D. R. Lorimer , J. Luo , R. S. Lynch , D. R. Madison , M. A. McLaughlin , S. T. McWilliams , C. M. F. Mingarelli , C. Ng , D. J. Nice , T. T. Pennucci , N. S. Pol , S. M. Ransom , P. S. Ray , X. Siemens , J. Simon , R. Spiewak , I. H. Stairs , D. R. Stinebring , K. Stovall , J. K. Swiggum , S. R. Taylor , M. Vallisneri , R. Van Haasterer , S. J. Vigeland , C. A. Witt , W. W. Zhu
An ensemble of inspiraling supermassive black hole binaries should produce a stochastic background of very low frequency gravitational waves. This stochastic background is predicted to be a power law, with a spectral index of -2/3, and it…
High Energy Astrophysical Phenomena · Physics
2020-02-26
J. S. Hazboun , J. Simon , S. R. Taylor , M. T. Lam , S. J. Vigeland , K. Islo , J. S. Key , Z. Arzoumanian , P. T. Baker , A. Brazier , P. R. Brook , S. Burke-Spolaor , S. Chatterjee , J. M. Cordes , N. J. Cornish , F. Crawford , K. Crowter , H. T. Cromartie , M. DeCesar , P. B. Demorest , T. Dolch , J. A. Ellis , R. D. Ferdman , E. Ferrara , E. Fonseca , N. Garver-Daniels , P. Gentile , D. Good , A. M. Holgado , E. A. Huerta , R. Jennings , G. Jones , M. L. Jones , A. R. Kaiser , D. L. Kaplan , L. Z. Kelley , T. J. W. Lazio , L. Levin , A. N. Lommen , D. R. Lorimer , J. Luo , R. S. Lynch , D. R. Madison , M. A. McLaughlin , S. T. McWilliams , C. M. F. Mingarelli , C. Ng , D. J. Nice , T. T. Pennucci , N. S. Pol , S. M. Ransom , P. S. Ray , X. Siemens , R. Spiewak , I. H. Stairs , D. R. Stinebring , K. Stovall , J. Swiggum , J. E. Turner , M. Vallisneri , R. van Haasteren , C. A. Witt , W. W. Zhu
Convincing evidence of a stochastic gravitational wave (GW) background has been found by the NANOGrav Collaboration in the 15-year data set. From this signal, we can evaluate the possibility of its source being from the early Universe…
Cosmology and Nongalactic Astrophysics · Physics
2024-08-30
Chris Choi , Jacob Magallanes , Murman Gurgenidze , Tina Kahniashvili
We report multiple lines of evidence for a stochastic signal that is correlated among 67 pulsars from the 15-year pulsar-timing data set collected by the North American Nanohertz Observatory for Gravitational Waves. The correlations follow…
High Energy Astrophysical Phenomena · Physics
2023-06-29
Gabriella Agazie , Akash Anumarlapudi , Anne M. Archibald , Zaven Arzoumanian , Paul T. Baker , Bence Becsy , Laura Blecha , Adam Brazier , Paul R. Brook , Sarah Burke-Spolaor , Rand Burnette , Robin Case , 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 , Megan E. DeCesar , Dallas DeGan , Paul B. Demorest , Heling Deng , Timothy Dolch , Brendan Drachler , Justin A. Ellis , Elizabeth C. Ferrara , William Fiore , Emmanuel Fonseca , Gabriel E. Freedman , Nate Garver-Daniels , Peter A. Gentile , Kyle A. Gersbach , Joseph Glaser , Deborah C. Good , Kayhan Gultekin , Jeffrey S. Hazboun , Sophie Hourihane , Kristina Islo , Ross J. Jennings , Aaron D. Johnson , Megan L. Jones , Andrew R. Kaiser , David L. Kaplan , Luke Zoltan Kelley , Matthew Kerr , Joey S. Key , Tonia C. Klein , Nima Laal , Michael T. Lam , William G. Lamb , T. Joseph W. Lazio , Natalia Lewandowska , Tyson B. Littenberg , Tingting Liu , Andrea Lommen , Duncan R. Lorimer , Jing Luo , Ryan S. Lynch , Chung-Pei Ma , Dustin R. Madison , Margaret A. Mattson , Alexander McEwen , James W. McKee , Maura A. McLaughlin , Natasha McMann , Bradley W. Meyers , Patrick M. Meyers , Chiara M. F. Mingarelli , Andrea Mitridate , Priyamvada Natarajan , Cherry Ng , David J. Nice , Stella Koch Ocker , Ken D. Olum , Timothy T. Pennucci , Benetge B. P. Perera , Polina Petrov , Nihan S. Pol , Henri A. Radovan , Scott M. Ransom , Paul S. Ray , Joseph D. Romano , 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 , Rutger van Haasteren , Sarah J. Vigeland , Haley M. Wahl , Qiaohong Wang , Caitlin A. Witt , Olivia Young
Pulsar-timing-array experiments have reported evidence for a stochastic background of nanohertz gravitational waves consistent with the signal expected from a population of supermassive--black-hole binaries. Their analyses assume power-law…
High Energy Astrophysical Phenomena · Physics
2025-03-17
Gabriella Agazie , Akash Anumarlapudi , Anne M. Archibald , Zaven Arzoumanian , Jeremy George Baier , Paul T. Baker , Bence Bécsy , Laura Blecha , Adam Brazier , Paul R. Brook , Sarah Burke-Spolaor , J. Andrew Casey-Clyde , Maria Charisi , Shami Chatterjee , Katerina Chatziioannou , Tyler Cohen , James M. Cordes , Neil J. Cornish , Fronefield Crawford , H. Thankful Cromartie , Kathryn Crowter , Megan E. DeCesar , Paul B. Demorest , Heling Deng , Lankeswar Dey , Timothy Dolch , Elizabeth C. Ferrara , William Fiore , Emmanuel Fonseca , Gabriel E. Freedman , Emiko C. Gardiner , Nate Garver-Daniels , Peter A. Gentile , Kyle A. Gersbach , Joseph Glaser , Deborah C. Good , Kayhan Gültekin , Jeffrey S. Hazboun , Ross J. Jennings , Aaron D. 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 , Bjorn Larsen , T. Joseph W. Lazio , Natalia Lewandowska , Tingting Liu , Duncan R. Lorimer , 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 M. F. Mingarelli , Andrea Mitridate , Cherry Ng , David J. Nice , Stella Koch Ocker , Ken D. Olum , Timothy T. Pennucci , Benetge B. P. Perera , Nihan S. Pol , Henri A. Radovan , Scott M. Ransom , Paul S. Ray , Joseph D. Romano , Jessie C. Runnoe , Alexander Saffer , Shashwat C. Sardesai , Ann Schmiedekamp , Carl Schmiedekamp , Kai Schmitz , Brent J. Shapiro-Albert , Xavier Siemens , Joseph Simon , Magdalena S. Siwek , Sophia V. Sosa Fiscella , Ingrid H. Stairs , Daniel R. Stinebring , Kevin Stovall , Abhimanyu Susobhanan , Joseph K. Swiggum , Stephen R. Taylor , Jacob E. Turner , Caner Unal , Michele Vallisneri , Sarah J. Vigeland , Haley M. Wahl , Caitlin A. Witt , David Wright , Olivia Young
Evidence for a low-frequency stochastic gravitational wave background has recently been reported based on analyses of pulsar timing array data. The most likely source of such a background is a population of supermassive black hole binaries,…
High Energy Astrophysical Phenomena · Physics
2023-07-26
Gabriella Agazie , Akash Anumarlapudi , Anne M. Archibald , Zaven Arzoumanian , Paul T. Baker , Bence Bécsy , Laura Blecha , Adam Brazier , Paul R. Brook , Sarah Burke-Spolaor , Robin Case , J. Andrew Casey-Clyde , Maria Charisi , Shami Chatterjee , Tyler Cohen , James M. Cordes , Neil Cornish , Fronefield Crawford , H. Thankful Cromartie , Kathryn Crowter , Megan DeCesar , Paul B. Demorest , Matthew C. Digman , Timothy Dolch , Brendan Drachler , Elizabeth C. Ferrara , William Fiore , Emmanuel Fonseca , Gabriel Freedman , Nathaniel Garver-Daniels , Peter Gentile , Joseph Glaser , Deborah Good , Kayhan Gültekin , Jeffrey Hazboun , Sophie Hourihane , Ross Jennings , Aaron D. Johnson , Megan Jones , Andrew R. Kaiser , David Kaplan , Luke Zoltan Kelley , Matthew Kerr , Joey Key , Nima Laal , Michael Lam , William G. Lamb , T. Joseph W. Lazio , Natalia Lewandowska , Tingting Liu , Duncan R. Lorimer , Jing Santiago Luo , Ryan S. Lynch , Chung-Pei Ma , Dustin Madison , Alexander McEwen , James W. McKee , Maura McLaughlin , Natasha McMann , Bradley W. Meyers , Patrick M. Meyers , Chiara M. F. Mingarelli , andrea mitridate , priya natarajan , Cherry Ng , David Nice , Stella Koch Ocker , Ken Olum , Timothy T. Pennucci , Benetge Perera , Polina Petrov , Nihan Pol , Henri A. Radovan , Scott Ransom , Paul S. Ray , Joseph Romano , Shashwat C. Sardesai , Ann Schmiedekamp , Carl Schmiedekamp , Kai Schmitz , Brent J. Shapiro-Albert , Xavier Siemens , Joseph Simon , Magdalena Siwek , Ingrid Stairs , Dan Stinebring , Kevin Stovall , Abhimanyu Susobhanan , Joseph Swiggum , Jacob Taylor , Stephen Taylor , Jacob E. Turner , Caner Unal , Michele Vallisneri , Rutger van Haasteren , Sarah J. Vigeland , Haley M. Wahl , Caitlin Witt , Olivia Young
The NANOGrav 15 yr Data Set: Piecewise Power-Law Reconstruction of the Gravitational-Wave Background
The NANOGrav 15-year (NG15) data set provides evidence for a gravitational-wave background (GWB) signal at nanohertz frequencies, which is expected to originate either from a cosmic population of inspiraling supermassive black-hole binaries…
High Energy Astrophysical Phenomena · Physics
2026-01-15
Gabriella Agazie , Akash Anumarlapudi , Anne M. Archibald , Zaven Arzoumanian , Jeremy G. Baier , Paul T. Baker , Bence Bécsy , Amit Bhoonah , Laura Blecha , Adam Brazier , Paul R. Brook , Sarah Burke-Spolaor , Rand Burnette , Robin Case , J. Andrew Casey-Clyde , Maria Charisi , Shami Chatterjee , Tyler Cohen , James M. Cordes , Neil J. Cornish , Fronefield Crawford , Thankful Cromartie , Kathryn Crowter , Megan E. DeCesar , Paul B. Demorest , Heling Deng , Lankeswar Dey , Timothy Dolch , Elizabeth C. Ferrara , William Fiore , Emmanuel Fonseca , Gabriel E. Freedman , Emiko C. Gardiner , Nate Garver-Daniels , Peter A. Gentile , Kyle A. Gersbach , Joseph Glaser , Brenda D. Gómez-Cortes , Deborah C. Good , Kayhan Gültekin , C. J. Harris , Jeffrey S. Hazboun , Ross J. Jennings , Aaron D. Johnson , Megan L. Jones , David L. Kaplan , Luke Zoltan Kelley , Matthew Kerr , Joey S. Key , Nima Laal , Michael T. Lam , William G. Lamb , Bjorn Larsen , T. Joseph W. Lazio , Natalia Lewandowska , Monica Leys , Tingting Liu , Duncan R. Lorimer , Jing Luo , Ryan S. Lynch , Chung-Pei Ma , Dustin R. Madison , Cayenne Matt , Alexander McEwen , James W. McKee , Maura A. McLaughlin , Natasha McMann , Bradley W. Meyers , Patrick M. Meyers , Chiara M. F. Mingarelli , Andrea Mitridate , Cherry Ng , David J. Nice , Stella Koch Ocker , Ken D. Olum , Timothy T. Pennucci , Benetge B. P. Perera , Polina Petrov , Nihan S. Pol , Henri A. Radovan , Scott M. Ransom , Paul S. Ray , Joseph D. Romano , Jessie C. Runnoe , Alexander Saffer , Shashwat C. Sardesai , Ann Schmiedekamp , Carl Schmiedekamp , Kai Schmitz , Brent J. Shapiro-Albert , Xavier Siemens , Joseph Simon , Sophia V. Sosa Fiscella , Ingrid H. Stairs , Daniel R. Stinebring , Kevin Stovall , Abhimanyu Susobhanan , Joseph K. Swiggum , Jacob Taylor , Stephen R. Taylor , Mercedes S. Thompson , Jacob E. Turner , Michele Vallisneri , Rutger van Haasteren , Sarah J. Vigeland , Haley M. Wahl , Si Wang , Kevin P. Wilson , Caitlin A. Witt , David Wright , Olivia Young
We investigate whether an Early-Universe stochastic gravitational-wave background (SGWB) can account for the common spectrum process reported by NANOGrav, while also being consistent with current and projected CMB measurements of extra…
Cosmology and Nongalactic Astrophysics · Physics
2025-09-18
Ido Ben-Dayan , Utkarsh Kumar , Amresh Verma
Pulsar timing array collaborations, such as the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), are seeking to detect nanohertz gravitational waves emitted by supermassive black hole binaries formed in the aftermath…
Astrophysics of Galaxies · Physics
2023-08-02
Zaven Arzoumanian , Paul T. Baker , Laura Blecha , Harsha Blumer , Adam Brazier , Paul R. Brook , Sarah Burke-Spolaor , Bence Bécsy , J. Andrew Casey-Clyde , Maria Charisi , Shami Chatterjee , Siyuan Chen , James M. Cordes , Neil J. Cornish , Fronefield Crawford , H. Thankful Cromartie , Megan E. DeCesar , Paul B. Demorest , Timothy Dolch , Brendan Drachler , Justin A. Ellis , E. C. Ferrara , William Fiore , Emmanuel Fonseca , Gabriel E. Freedman , Nathan Garver-Daniels , Peter A. Gentile , Joseph Glaser , Deborah C. Good , Kayhan Gültekin , Jeffrey S. Hazboun , Ross J. Jennings , Aaron D. Johnson , Megan L. Jones , Andrew R. Kaiser , David L. Kaplan , Luke Zoltan Kelley , Joey Shapiro Key , Nima Laal , Michael T. Lam , William G Lamb , T. Joseph W. Lazio , Natalia Lewandowska , Tingting Liu , Duncan R. Lorimer , Jing Luo , Ryan S. Lynch , Dustin R. Madison , Alexander McEwen , Maura A. McLaughlin , Chiara M. F. Mingarelli , Cherry Ng , David J. Nice , Stella Koch Ocker , Ken D. Olum , Timothy T. Pennucci , Nihan S. Pol , Scott M. Ransom , Paul S. Ray , Joseph D. Romano , Brent J. Shapiro-Albert , Xavier Siemens , Joseph Simon , Magdalena Siwek , Renée Spiewak , Ingrid H. Stairs , Daniel R. Stinebring , Kevin Stovall , Joseph K. Swiggum , Jessica Sydnor , Stephen R. Taylor , Jacob E. Turner , Michele Vallisneri , Sarah J. Vigeland , Haley M. Wahl , Gregory Walsh , Caitlin A. Witt , Olivia Young
The cosmic merger history of supermassive black hole binaries (SMBHBs) is expected to produce a low-frequency gravitational wave background (GWB). Here we investigate how signs of the discrete nature of this GWB can manifest in pulsar…
High Energy Astrophysical Phenomena · Physics
2025-01-16
Gabriella Agazie , Akash Anumarlapudi , Anne M. Archibald , Zaven Arzoumanian , Jeremy George Baier , Paul T. Baker , Bence Bécsy , Laura Blecha , Adam Brazier , Paul R. Brook , Lucas Brown , Sarah Burke-Spolaor , J. Andrew Casey-Clyde , Maria Charisi , Shami Chatterjee , Tyler Cohen , James M. Cordes , Neil J. Cornish , Fronefield Crawford , H. Thankful Cromartie , Kathryn Crowter , Megan E. DeCesar , Paul B. Demorest , Heling Deng , Timothy Dolch , Elizabeth C. Ferrara , William Fiore , Emmanuel Fonseca , Gabriel E. Freedman , Nate Garver-Daniels , Peter A. Gentile , Joseph Glaser , Deborah C. Good , Kayhan Gültekin , Jeffrey S. Hazboun , Ross J. Jennings , Aaron D. 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 , Bjorn Larsen , T. Joseph W. Lazio , Natalia Lewandowska , Tingting Liu , Duncan R. Lorimer , 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 M. F. Mingarelli , Andrea Mitridate , Priyamvada Natarajan , Cherry Ng , David J. Nice , Stella Koch Ocker , Ken D. Olum , Timothy T. Pennucci , Benetge B. P. Perera , 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 , Brent Shapiro-Albert , Xavier Siemens , Joseph Simon , Magdalena S. Siwek , Sophia V. Sosa Fiscella , Ingrid H. Stairs , Daniel R. Stinebring , Kevin Stovall , Abhimanyu Susobhanan , Joseph K. Swiggum , Stephen R. Taylor , Jacob E. Turner , Caner Unal , Michele Vallisneri , Sarah J. Vigeland , Haley M. Wahl , London Willson , Caitlin A. Witt , David Wright , Olivia Young
We discuss the interpretation of the detected signal by Pulsar Timing Array (PTA) observations as a gravitational wave background (GWB) of cosmological origin. We combine NANOGrav 15-years and EPTA-DR2new data sets and confront them against…
Cosmology and Nongalactic Astrophysics · Physics
2024-04-29
Daniel G. Figueroa , Mauro Pieroni , Angelo Ricciardone , Peera Simakachorn
Pulsar timing data used to provide upper limits on a possible stochastic gravitational wave background (SGWB). However, the NANOGrav Collaboration has recently reported strong evidence for a stochastic common-spectrum process, which we…
The recent detection of a common-spectrum stochastic signal by multiple pulsar timing array (PTA) collaborations has provided tentative evidence for a nanohertz (nHz) stochastic gravitational-wave background (SGWB). This signal can be…