Induced gravitational waves in a general cosmological background
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. H...
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
12 February 2020
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| In: |
International journal of modern physics
Year: 2020, Volume: 29, Issue: 3 |
| ISSN: | 1793-6594 |
| DOI: | 10.1142/S0218271820500285 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1142/S0218271820500285 Verlag, lizenzpflichtig, Volltext: https://www.worldscientific.com/doi/abs/10.1142/S0218271820500285 
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| Author Notes: | Guillem Domènech |
| Summary: | 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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| Item Description: | Gesehen am 09.04.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1793-6594 |
| DOI: | 10.1142/S0218271820500285 |