Gravitational wave background as a probe of the primordial black hole abundance

Details Gravitational wave background as a probe of the primordial black hole abundance Gravitational wave background as a probe of the primordial black hole abundance

2008-12-23

arxiv.org/abs/0812.4339v2

Phys.Rev.Lett.102:161101,2009

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.102.161101

Formation of significant number of primordial black holes (PBHs) is realized if and only if primordial density fluctuations have a large amplitude, which means that tensor perturbations generated from these scalar perturbations as a second order effect are also large and comparable to the observational data. We show that pulsar timing observation could find/rule out PBHs with \sim 10^2 M_solar which are considered as a candidate of intermediate-mass black holes and that PBHs with mass range 10^{20-26} g, which serves as a candidate of dark matter, may be probed by future space-based laser interferometers and atomic interferometers.

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