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Remnants of Galactic Subhalos and Their Impact on Indirect Dark-Matter Searches

Laboratoire Univers et Particules de Montpellier (LUPM), Université de Montpellier & CNRS, Place Eugène Bataillon, 34095 Montpellier CEDEX 05, France
Instituto de Fisica Teórica, C/ Nicolás Cabrera 13-15, Campus de Cantoblanco UAM, 28049 Madrid, Spain
Author to whom correspondence should be addressed.
Galaxies 2019, 7(2), 65;
Received: 6 May 2019 / Revised: 28 May 2019 / Accepted: 29 May 2019 / Published: 4 June 2019
(This article belongs to the Special Issue The Role of Halo Substructure in Gamma-Ray Dark Matter Searches)
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Dark-matter subhalos, predicted in large numbers in the cold-dark-matter scenario, should have an impact on dark-matter-particle searches. Recent results show that tidal disruption of these objects in computer simulations is overefficient due to numerical artifacts and resolution effects. Accounting for these results, we re-estimated the subhalo abundance in the Milky Way using semianalytical techniques. In particular, we showed that the boost factor for gamma rays and cosmic-ray antiprotons is increased by roughly a factor of two. View Full-Text
Keywords: particle dark matter; subhalos; indirect searches. particle dark matter; subhalos; indirect searches.

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Stref, M.; Lacroix, T.; Lavalle, J. Remnants of Galactic Subhalos and Their Impact on Indirect Dark-Matter Searches. Galaxies 2019, 7, 65.

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