Induced gravitational waves in a general cosmological background

• Verfasst von: Domènech Fuertes, Guillem [VerfasserIn]
• Titel: Induced gravitational waves in a general cosmological background
• Verf.angabe: Guillem Domènech
• E-Jahr: 2020
• Jahr: 12 February 2020
• Umfang: 32 S.
• Fussnoten: Gesehen am 09.04.2020
• Titel Quelle: Enthalten in: International journal of modern physics / D
• Ort Quelle: Singapore [u.a.] : World Scientific Publ., 1992
• Jahr Quelle: 2020
• Band/Heft Quelle: 29(2020,3) Artikel-Nummer 2050028, 32 Seiten
• ISSN Quelle: 1793-6594
• DOI: doi:10.1142/S0218271820500285
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1694342409

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.