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Decaying dark matter in halos of primordial black holes
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics. Alballova Univ Ctr, Oskar Klein Ctr Cosmoparticle Phys, Roslagstullsbacken 21, S-10691 Stockholm, Sweden..ORCID iD: 0000-0002-1528-1920
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics. Alballova Univ Ctr, Oskar Klein Ctr Cosmoparticle Phys, Roslagstullsbacken 21, S-10691 Stockholm, Sweden.;Univ Iceland, Sci Inst, Dunhaga 3, IS-107 Reykjavik, Iceland..ORCID iD: 0000-0002-3525-8349
2019 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 79, no 8, article id 687Article in journal (Refereed) Published
Abstract [en]

We investigate photon signatures of general decaying dark-matter particles in halos of primordial black holes. We derive the halo-profile density and the total decay rate for these combined dark-matter scenarios. For the case of axion-like particles of masses below O(1)keV, we find strong bounds on the decay constant which are several orders of magnitude stronger than the strongest existing bounds, for all halo masses above O(10-5) solar masses. Using future X-ray measurements, it will be possible to push these bounds on such combined dark-matter scenarios even further.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 79, no 8, article id 687
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-257436DOI: 10.1140/epjc/s10052-019-7173-xISI: 000480817200003Scopus ID: 2-s2.0-85070680713OAI: oai:DiVA.org:kth-257436DiVA, id: diva2:1347243
Note

QC 20190830

Available from: 2019-08-30 Created: 2019-08-30 Last updated: 2019-09-05Bibliographically approved

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Kühnel, FlorianOhlsson, Tommy

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