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

Galaxies

Thomas Lacroix¹  Julien Lavalle²  Martin Stref³ 

[1] 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;;Laboratoire Univers et Particules de Montpellier (LUPM), Université de Montpellier &

关键词: particle dark matter;    subhalos;    indirect searches.;   

DOI  :  10.3390/galaxies7020065

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown