Cosmological constraints on late-universe decaying dark matter as a solution to the $H_0$ tension
| Autor: | Kyriakos Vattis, Steven J. Clark, Savvas M. Koushiappas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) 010308 nuclear & particles physics media_common.quotation_subject Dark matter Cosmic microwave background Spectral density FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Universe High Energy Physics - Phenomenology Amplitude High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Dark energy 010306 general physics Anisotropy Multipole expansion media_common Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | It has been suggested that late-universe dark matter decays can alleviate the tension between measurements of $H_0$ in the local universe and its value inferred from cosmic microwave background fluctuations. It has been suggested that decaying dark matter can potentially account for this discrepancy as it reshuffles the energy density between matter and radiation and as a result allows dark energy to become dominant at earlier times. In this work, we show that the low multipole amplitude of the cosmic microwave background anisotropy power spectrum severely constrains the feasibility of late-time decays as a solution to the $H_0$ tension. 13 pages, 5 figures; Replaced with version accepted for publication in PRD |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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