Simulations of PBH formation at the QCD epoch and comparison with the GWTC-3 catalog
| Autor: | Albert Escrivà, Eleni Bagui, Sebastien Clesse |
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| Rok vydání: | 2022 |
| Předmět: |
High Energy Physics - Theory
Cosmology and Nongalactic Astrophysics (astro-ph.CO) High Energy Physics - Theory (hep-th) FOS: Physical sciences Astronomy and Astrophysics General Relativity and Quantum Cosmology (gr-qc) General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics |
| DOI: | 10.48550/arxiv.2209.06196 |
| Popis: | The probability of primordial black hole (PBH) formation is known to be boosted during the Quantum Chromodynamics (QCD) crossover due to a slight reduction of the equation of state. This induces a high peak and other features in the PBH mass distribution. But the impact of this variation during the PBH formation has been so far neglected. In this work we simulate for the first time the formation of PBHs by taking into account the varying equation of state at the QCD epoch, compute the over-density threshold using different curvature profiles and find that the resulting PBH mass distributions are significantly impacted. The expected merger rate distributions of early and late PBH binaries is comparable to the ones inferred from the GWTC-3 catalog for dark matter fractions in PBHs within $0.1 < f_{\rm PBH} 44 pages, 18 figures, details added on the rate suppresion factor, comments welcome |
| Databáze: | OpenAIRE |
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