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. 2021 Dec 17;127(25):251302.
doi: 10.1103/PhysRevLett.127.251302.

Searching for Gravitational Waves from Cosmological Phase Transitions with the NANOGrav 12.5-Year Dataset

Zaven Arzoumanian  1 Paul T Baker  2 Harsha Blumer  3   4 Bence Bécsy  5 Adam Brazier  6   7 Paul R Brook  3   4 Sarah Burke-Spolaor  3   4   8 Maria Charisi  9 Shami Chatterjee  6 Siyuan Chen  10   11   12 James M Cordes  6 Neil J Cornish  5 Fronefield Crawford  13 H Thankful Cromartie  6 Megan E DeCesar  14   15 Paul B Demorest  16 Timothy Dolch  17   18 Justin A Ellis  19 Elizabeth C Ferrara  20   21   22 William Fiore  3   4 Emmanuel Fonseca  23 Nathan Garver-Daniels  3   4 Peter A Gentile  3   4 Deborah C Good  24 Jeffrey S Hazboun  25 A Miguel Holgado  26   27 Kristina Islo  28 Ross J Jennings  6 Megan L Jones  28 Andrew R Kaiser  3   4 David L Kaplan  28 Luke Zoltan Kelley  29 Joey Shapiro Key  25 Nima Laal  30 Michael T Lam  31   32 T Joseph W Lazio  33 Vincent S H Lee  34 Duncan R Lorimer  3   4 Jing Luo  35 Ryan S Lynch  36 Dustin R Madison  3   4 Maura A McLaughlin  3   4 Chiara M F Mingarelli  37   38 Andrea Mitridate  34 Cherry Ng  39 David J Nice  14 Timothy T Pennucci  40   41 Nihan S Pol  3   4   9 Scott M Ransom  40 Paul S Ray  42 Brent J Shapiro-Albert  3   4 Xavier Siemens  28   30 Joseph Simon  33   43 Renée Spiewak  44 Ingrid H Stairs  24 Daniel R Stinebring  45 Kevin Stovall  16 Jerry P Sun  30 Joseph K Swiggum  14 Stephen R Taylor  9 Jacob E Turner  3   4 Michele Vallisneri  33 Sarah J Vigeland  28 Caitlin A Witt  3   4 Kathryn M Zurek  34 NANOGrav Collaboration
Affiliations

Searching for Gravitational Waves from Cosmological Phase Transitions with the NANOGrav 12.5-Year Dataset

Zaven Arzoumanian et al. Phys Rev Lett. .

Abstract

We search for a first-order phase transition gravitational wave signal in 45 pulsars from the NANOGrav 12.5-year dataset. We find that the data can be modeled in terms of a strong first order phase transition taking place at temperatures below the electroweak scale. However, we do not observe any strong preference for a phase-transition interpretation of the signal over the standard astrophysical interpretation in terms of supermassive black hole mergers; but we expect to gain additional discriminating power with future datasets, improving the signal to noise ratio and extending the sensitivity window to lower frequencies. An interesting open question is how well gravitational wave observatories could separate such signals.

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