scholarly journals Examining the end of inflation with primordial black hole mass distribution and gravitational waves

2021 ◽  
Vol 103 (12) ◽  
Author(s):  
Amjad Ashoorioon ◽  
Abasalt Rostami ◽  
Javad T. Firouzjaee
Keyword(s):  
Black Hole ◽  
Gravitational Waves ◽  
Mass Distribution ◽  
Primordial Black Hole ◽  
Black Hole Mass

On Primordial Black Holes and secondary gravitational waves generated from inflation with solo/multi-bumpy potential

2021 ◽  
Author(s):  
Rui feng Zheng ◽  
Jia ming Shi ◽  
Taotao Qiu
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Gravitational Waves ◽  
Power Spectra ◽  
Small Scale ◽  
Primordial Black Hole ◽  
Primordial Black Holes ◽  
Slow Roll ◽  
Spherical Collapse ◽  
Scalar Perturbations

Abstract It is well known that primordial black hole (PBH) can be generated in inflation process of the early universe, especially when the inflaton field has some non-trivial features that could break the slow-roll condition. In this paper, we investigate a toy model of inflation with bumpy potential, which has one or several bumps. We found that potential with multi-bump can give rise to power spectra with multi peaks in small-scale region, which can in turn predict the generation of primordial black holes in various mass ranges. We also consider the two possibilities of PBH formation by spherical collapse and elliptical collapse. And discusses the scalar-induced gravitational waves (SIGWs) generated by the second-order scalar perturbations.

scholarly journals EVOLUTION OF PRIMORDIAL BLACK HOLE MASS SPECTRUM IN BRANS–DICKE THEORY

2013 ◽  
Vol 22 (05) ◽  
pp. 1350022 ◽  
Author(s):  
D. DWIVEDEE ◽  
B. NAYAK ◽  
L. P. SINGH
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Mass Spectrum ◽  
Energy Density ◽  
Analytic Solutions ◽  
Primordial Black Hole ◽  
Primordial Black Holes ◽  
Black Hole Mass ◽  
Linear And Nonlinear ◽  
The Universe

We investigate the evolution of primordial black hole mass spectrum by including both accretion of radiation and Hawking evaporation within Brans–Dicke (BD) cosmology in radiation-, matter- and vacuum-dominated eras. We also consider the effect of evaporation of primordial black holes on the expansion dynamics of the universe. The analytic solutions describing the energy density of the black holes in equilibrium with radiation are presented. We demonstrate that these solutions act as attractors for the system ensuring stability for both linear and nonlinear situations. We show, however, that inclusion of accretion of radiation delays the onset of this equilibrium in all radiation-, matter- and vacuum-dominated eras.

scholarly journals Prospects for probing gravitational waves from primordial black hole binaries

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Oriol Pujolas ◽  
Ville Vaskonen ◽  
Hardi Veermäe
Keyword(s):  
Black Hole ◽  
Gravitational Waves ◽  
Primordial Black Hole ◽  
Black Hole Binaries

scholarly journals The Impact of Pair-instability Mass Loss on the Binary Black Hole Mass Distribution

2019 ◽  
Vol 882 (2) ◽  
pp. 121 ◽  
Author(s):  
Simon Stevenson ◽  
Matthew Sampson ◽  
Jade Powell ◽  
Alejandro Vigna-Gómez ◽  
Coenraad J. Neijssel ◽  
...  
Keyword(s):  
Black Hole ◽  
Mass Loss ◽  
Mass Distribution ◽  
Black Hole Mass ◽  
Binary Black Hole ◽  
The Impact

scholarly journals Induced gravitational waves in a general cosmological background

2020 ◽  
Vol 29 (03) ◽  
pp. 2050028 ◽  
Author(s):  
Guillem Domènech
Keyword(s):  
Black Hole ◽  
Perturbation Theory ◽  
Equation Of State ◽  
Gravitational Waves ◽  
Primordial Black Hole ◽  
Cosmological Perturbation ◽  
Cosmological Perturbation Theory ◽  
Cosmological Background ◽  
Integral Formulas ◽  
Small Scales

Gravitational waves (GWs) are inevitably produced by second-order terms in cosmological perturbation theory. Most notably, the so-called induced (GWs) are a window to the small scales part of the primordial spectrum of fluctuations and a key counterpart to the primordial black hole (PBH) scenario. However, semi-analytical solutions are only known for matter and radiation domination eras. In this paper, we present new analytic integral formulas for the induced GWs on subhorizon scales in a general cosmological background with a constant equation-of-state. We also discuss applications to a peaked primordial scalar power spectrum and the PBH scenario.

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