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

Autor: Arzoumanian Z; X-Ray Astrophysics Laboratory, NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA., Baker PT; Department of Physics and Astronomy, Widener University, One University Place, Chester, Pennsylvania 19013, USA., Blumer H; Department of Physics and Astronomy, West Virginia University, P.O. Box 6315, Morgantown, West Virginia 26506, USA.; Center for Gravitational Waves and Cosmology, West Virginia University, Chestnut Ridge Research Building, Morgantown, West Virginia 26505, USA., Bécsy B; Department of Physics, Montana State University, Bozeman, Montana 59717, USA., Brazier A; Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, New York 14853, USA.; Cornell Center for Advanced Computing, Cornell University, Ithaca, New York 14853, USA., Brook PR; Department of Physics and Astronomy, West Virginia University, P.O. Box 6315, Morgantown, West Virginia 26506, USA.; Center for Gravitational Waves and Cosmology, West Virginia University, Chestnut Ridge Research Building, Morgantown, West Virginia 26505, USA., Burke-Spolaor S; Department of Physics and Astronomy, West Virginia University, P.O. 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Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2021 Dec 17; Vol. 127 (25), pp. 251302.
DOI: 10.1103/PhysRevLett.127.251302
Abstrakt: 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.
Databáze: MEDLINE