Primordial black holes and gravitational waves from dissipation during inflation
| Autor: | Guillermo Ballesteros, Marcos A.G. García, Alejandro Pérez Rodríguez, Mathias Pierre, Julián Rey |
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| Přispěvatelé: | UAM. Departamento de Física Teórica |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
High Energy Physics - Theory
induced [gravitational radiation] curvature perturbation power spectrum General Relativity and Quantum Cosmology mass spectrum High Energy Physics - Phenomenology (hep-ph) Dark Matter energy: density cosmology of theories beyond the SM density [dark matter] primordial black holes gravitational radiation: induced black hole primordial dissipation gravitational waves / theory inflation: model curvature fluctuation High Energy Physics - Phenomenology curvature: perturbation thermal [noise] Einstein equation black hole: primordial density [energy] fluctuation [curvature] Astrophysics - Cosmology and Nongalactic Astrophysics Black Holes Cosmology and Nongalactic Astrophysics (astro-ph.CO) primordial [black hole] FOS: Physical sciences energy density dark matter: density General Relativity and Quantum Cosmology (gr-qc) dark matter noise: thermal model [inflation] mixing ddc:530 background [gravitational radiation] inflation enhancement perturbation theory Gravitational Waves perturbation [curvature] background stochastic gravitational radiation: background Física differential equations Astronomy and Astrophysics noise thermal background: stochastic stochastic [background] High Energy Physics - Theory (hep-th) curvature: fluctuation gravitational radiation induced gravitational radiation background |
| Zdroj: | Journal of cosmology and astroparticle physics 12(12), 006 (2022). doi:10.1088/1475-7516/2022/12/006 |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2022/12/006 |
| Popis: | Journal of cosmology and astroparticle physics 12(12), 006 (2022). doi:10.1088/1475-7516/2022/12/006 We study the generation of a localized peak in the primordial spectrum of curvature perturbations from a transient dissipative phase during inflation, leading to a large population of primordial black holes. The enhancement of the power spectrum occurs due to stochastic thermal noise sourcing curvature fluctuations. We solve the stochastic system of Einstein equations for many realizations of the noise and obtain the distribution for the curvature power spectrum. We then propose a method to find its expectation value using a deterministic system of differential equations. In addition, we find a single stochastic equation whose analytic solution helps to understand the main features of the spectrum. Finally, we derive a complete expression and a numerical estimate for the energy density of the stochastic background of gravitational waves induced at second order in perturbation theory. This includes the gravitational waves induced during inflation, during the subsequent radiation epoch and their mixing. Our scenario provides a novel way of generating primordial black hole dark matter with a peaked mass distribution and a detectable stochastic background of gravitational waves from inflation. Published by IOP, London |
| Databáze: | OpenAIRE |
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