NANOGrav results and dark first order phase transitions

NANOGrav results and dark first order phase transitions

The recent NANOGrav evidence of a common-source stochastic background provides a hint to gravitational waves (GW) radiation from the Early Universe. We show that this result can be interpreted as a GW spectrum produced from first order phase transitions (FOPTs) around a temperature in the keV-MeV wi...

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Veröffentlicht in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2021-09, Vol.64 (9), p.290411, Article 290411
Hauptverfasser: Addazi, Andrea, Cai, Yi-Fu, Gan, Qingyu, Marciano, Antonino, Zeng, Kaiqiang
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy
Black holes
Classical and Continuum Physics
Dark matter
Electroweak model
Gravitational waves
Observations and Techniques
Phase transitions
Physics
Physics and Astronomy
Radiation
Radiation, Background
Science
Temperature
Universe
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Zusammenfassung:The recent NANOGrav evidence of a common-source stochastic background provides a hint to gravitational waves (GW) radiation from the Early Universe. We show that this result can be interpreted as a GW spectrum produced from first order phase transitions (FOPTs) around a temperature in the keV-MeV window. Such a class of FOPTs at temperatures much below the electroweak scale can be naturally envisaged in several warm dark matter models such as Majoron dark matter.
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-021-1724-6