Details
| Original language | English |
|---|---|
| Article number | 2050028 |
| Journal | International Journal of Modern Physics D |
| Volume | 29 |
| Issue number | 3 |
| Publication status | Published - Feb 2020 |
| Externally published | Yes |
Abstract
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.
Keywords
- Cosmology, Early universe, induced gravitational waves, primordial black holes, stochastic gravitational wave background
ASJC Scopus subject areas
- Mathematics(all)
- Mathematical Physics
- Physics and Astronomy(all)
- Astronomy and Astrophysics
- Earth and Planetary Sciences(all)
- Space and Planetary Science
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In: International Journal of Modern Physics D, Vol. 29, No. 3, 2050028, 02.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Induced gravitational waves in a general cosmological background
AU - Domènech, Guillem
N1 - Publisher Copyright: © 2020 World Scientific Publishing Company.
PY - 2020/2
Y1 - 2020/2
N2 - 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.
AB - 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.
KW - Cosmology
KW - Early universe
KW - induced gravitational waves
KW - primordial black holes
KW - stochastic gravitational wave background
UR - http://www.scopus.com/inward/record.url?scp=85079745065&partnerID=8YFLogxK
U2 - 10.1142/S0218271820500285
DO - 10.1142/S0218271820500285
M3 - Article
VL - 29
JO - International Journal of Modern Physics D
JF - International Journal of Modern Physics D
SN - 0218-2718
IS - 3
M1 - 2050028
ER -