Primordial Black Hole Dark Matter and LIGO/Virgo Merger Rate from Inflation with Running Spectral Indices: Formation in the Matter- and/or Radiation-Dominated Universe

Kohri, Kazunori; Terada, Takahiro

doi:10.1088/1361-6382/aaea18

Primordial Black Hole Dark Matter and LIGO/Virgo Merger Rate from Inflation with Running Spectral Indices: Formation in the Matter- and/or Radiation-Dominated Universe

Kazunori Kohri
(
- KEK, Tsukuba and
- Sokendai, Tsukuba and
- Oxford U., Theor. Phys.
)
,
Takahiro Terada
(
- KEK, Tsukuba
)

Mar 5, 2018

19 pages

Published in:

Class.Quant.Grav. 35 (2018) 23, 235017

Published: Nov 12, 2018

e-Print:

1802.06785 [astro-ph.CO]

DOI:

10.1088/1361-6382/aaea18 (publication)

Report number:

KEK-TH-2034,
KEK-Cosmo-221,
KEK-COSMO-221

View in:

ADS Abstract Service

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Abstract: (IOP)

We study possibilities to explain the whole dark matter abundance by primordial black holes (PBHs) or to explain the merger rate of binary black holes estimated from the gravitational wave detections by LIGO/Virgo. We assume that the PBHs are originated in a radiation- or matter-dominated era from large primordial curvature perturbation generated by inflation. We take a simple model-independent approach considering inflation with large running spectral indices which are parametrized by , and consistent with the observational bounds. The merger rate is fitted by PBHs with masses of produced in the radiation-dominated era. Then the running of running should be , which can be tested by future observation. On the other hand, the whole abundance of dark matter is consistent with PBHs with masses of asteroids () produced in an early matter-dominated era if a set of running parameters are properly realized.

Note:

27 pages, 7 figures; Figures are replaced with the correct ones. (In v3, older versions of figures were accidentally uploaded.)

black hole: primordial
curvature: primordial
black hole: binary
curvature: perturbation
dark matter
inflation
VIRGO
LIGO
gravitational radiation

References(142)

Figures(9)

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