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

  • NASA Goddard Space Flight Center
  • Widener University
  • West Virginia University
  • Montana State University
  • Cornell University
  • Canadian Institute for Advanced Research
  • Vanderbilt University
  • CNRS
  • Université d'Orléans
  • Franklin and Marshall College, Lancaster
  • Lafayette College
  • George Mason University
  • Naval Research Laboratory
  • National Science Foundation
  • Hillsdale College
  • Eureka Scientific, Inc.
  • University of Maryland, College Park
  • McGill University
  • University of Washington
  • University of Illinois at Urbana-Champaign
  • Carnegie Mellon University
  • University of Wisconsin-Milwaukee
  • Northwestern University
  • Oregon State University
  • Rochester Institute of Technology
  • Jet Propulsion Laboratory, California Institute of Technology
  • California Institute of Technology
  • University of Toronto
  • Simons Foundation
  • University of Connecticut
  • Eötvös Loránd University

Research output: Contribution to journalArticlepeer-review

109 Scopus citations

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.

Original languageEnglish
Article numberA42
JournalPhysical Review Letters
Volume127
Issue number25
DOIs
StatePublished - Dec 17 2021

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