Journal
PHYSICS LETTERS B
Volume 813, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2020.136040
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Funding
- JSPS KAKENHI [JP17H01131]
- MEXT KAKENHI [JP19H05114, JP20H04750]
- IBS [IBS-R018-D1]
- Ministry of Science & ICT (MSIT), Republic of Korea [IBS-R018-D1-2021-A00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The NANOGrav collaboration recently announced evidence of an isotropic stochastic process, potentially the first detection of the stochastic gravitational-wave background. They discuss the possibility that this signal is caused by second-order gravitational waves associated with the formation of solar-mass primordial black holes, and propose testing methods for future observations.
The NANOGrav collaboration for the pulsar timing array (PTA) observation recently announced evidence of an isotropic stochastic process, which may be the first detection of the stochastic gravitational-wave (GW) background. We discuss the possibility that the signal is caused by the second-order GWs associated with the formation of solar-mass primordial black holes (PBHs). This possibility can be tested by future interferometer-type GW observations targeting the stochastic GWs from merger events of solar-mass PBHs as well as by updates of PTA observations. (C) 2020 The Author(s). Published by Elsevier B.V.
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