期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 10, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2019/10/059
关键词
gravitational waves / experiments; gravitational waves / theory; primordial black holes; primordial gravitational waves (theory)
资金
- National Natural Science Foundation of China [11435006, 11647601, 11690022, 11821505, 11851302]
- Strategic Priority Research Program of CAS [XDB23010500, XDB23030100]
- Key Research Program of Frontier Sciences of CAS
- MEXT/JSPS KAKENHI [15H05888]
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- Tufts University
If the black holes detected by LIGO/VIRGO are primordial black holes (PBHs) sourcing from a large primordial curvature perturbation on small scales, the corresponding induced gravitational waves (GWs) would peak at nanohertz that is detectable by the current and future observations of pulsar timing array (PTA). In this paper we show that with the mass function estimated from the merger rate of LIGO O1 and O2 events, the induced GWs from such a curvature perturbation with a Gaussian narrow peak at some small scale would be in a seemingly mild tension with current constraints from PTA. However, if the curvature perturbation is of local-type non-Gaussianity with a non-linear parameter f(NL) greater than or similar to O(10), the tension could be relieved. Nevertheless, such an induced GWs must be detectable by the Square Kilometer Array in a decade or less.
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