Details
| Original language | English |
|---|---|
| Article number | 230411 |
| Journal | Science China: Physics, Mechanics and Astronomy |
| Volume | 65 |
| Issue number | 3 |
| Publication status | Published - Mar 2022 |
| Externally published | Yes |
Abstract
Recently, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) claimed the detection of a stochastic common-spectrum process of the pulsar timing array (PTA) time residuals from their 12.5 year data, which might be the first detection of the stochastic background of gravitational waves (GWs). We show that the amplitude and the power index of such waves imply that they could be the secondary GWs induced by the peaked curvature perturbation with a dust-like post inflationary era with −0.091 ≲ w ≲ 0.048. Such stochastic background of GWs naturally predicts substantial existence of planet-mass primordial black holes (PBHs), which can be the lensing objects for the ultrashort-timescale microlensing events observed by the Optical Gravitational Lensing Experiment (OGLE).
Keywords
- pulsar timing array, stochastic gravitational waves, the early universe
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Science China: Physics, Mechanics and Astronomy, Vol. 65, No. 3, 230411, 03.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - NANOGrav hints on planet-mass primordial black holes
AU - Domènech, Guillem
AU - Pi, Shi
N1 - Publisher Copyright: © 2022, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2022/3
Y1 - 2022/3
N2 - Recently, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) claimed the detection of a stochastic common-spectrum process of the pulsar timing array (PTA) time residuals from their 12.5 year data, which might be the first detection of the stochastic background of gravitational waves (GWs). We show that the amplitude and the power index of such waves imply that they could be the secondary GWs induced by the peaked curvature perturbation with a dust-like post inflationary era with −0.091 ≲ w ≲ 0.048. Such stochastic background of GWs naturally predicts substantial existence of planet-mass primordial black holes (PBHs), which can be the lensing objects for the ultrashort-timescale microlensing events observed by the Optical Gravitational Lensing Experiment (OGLE).
AB - Recently, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) claimed the detection of a stochastic common-spectrum process of the pulsar timing array (PTA) time residuals from their 12.5 year data, which might be the first detection of the stochastic background of gravitational waves (GWs). We show that the amplitude and the power index of such waves imply that they could be the secondary GWs induced by the peaked curvature perturbation with a dust-like post inflationary era with −0.091 ≲ w ≲ 0.048. Such stochastic background of GWs naturally predicts substantial existence of planet-mass primordial black holes (PBHs), which can be the lensing objects for the ultrashort-timescale microlensing events observed by the Optical Gravitational Lensing Experiment (OGLE).
KW - pulsar timing array
KW - stochastic gravitational waves
KW - the early universe
UR - http://www.scopus.com/inward/record.url?scp=85123295358&partnerID=8YFLogxK
U2 - 10.1007/s11433-021-1839-6
DO - 10.1007/s11433-021-1839-6
M3 - Article
VL - 65
JO - Science China: Physics, Mechanics and Astronomy
JF - Science China: Physics, Mechanics and Astronomy
SN - 1674-7348
IS - 3
M1 - 230411
ER -