Shining primordial black holes
| Autor: | Tsutomu T. Yanagida, Mark P. Hertzberg, Sami Nurmi, Enrico D. Schiappacasse |
|---|---|
| Přispěvatelé: | Helsinki Institute of Physics |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Milky Way Astrophysics::High Energy Astrophysical Phenomena astrofysiikka DARK-MATTER ANNIHILATION FOS: Physical sciences mustat aukot Primordial black hole Astrophysics General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics kosmologia 7. Clean energy 01 natural sciences 114 Physical sciences General Relativity and Quantum Cosmology pimeä aine High Energy Physics - Phenomenology (hep-ph) WIMP 0103 physical sciences 010306 general physics Astrophysics::Galaxy Astrophysics Physics High Energy Astrophysical Phenomena (astro-ph.HE) Annihilation 010308 nuclear & particles physics Galactic Center GAMMA-RAYS CONSTRAINTS Fermion High Energy Physics - Phenomenology Mixed dark matter MILKY Halo Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Physical Review |
| Popis: | We study the well-motivated mixed dark matter (DM) scenario composed of a dominant thermal WIMP, highlighting the case of $SU(2)_L$ triplet fermion "winos", with a small fraction of primordial black holes (PBHs). After the wino kinetic decoupling, the DM particles are captured by PBHs leading to the presence of PBHs with dark minihalos in the Milky Way today. The strongest constraints for the wino DM come from the production of narrow line gamma rays from wino annihilation in the Galactic Center. We analyse in detail the viability of the mixed wino DM scenario, and determine the constraints on the fraction of DM in PBHs assuming a cored halo profile in the Milky Way. We show that already with the sensitivity of current indirect searches, there is a significant probability for detecting a gamma ray signal characteristic for the wino annihilation in a single nearby dressed PBH when $M_{\text{PBH}} \sim M_{\odot}$, which we refer to as a "shining black hole". Similar results should apply also in more general setups with ultracompact minihalos or other DM models, since the accretion of DM around large overdensities and DM annihilation are both quite generic processes. Comment: 11 pages, 8 figures. V2: Updated towards version accepted for publication in Physical Review D |
| Databáze: | OpenAIRE |
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