TeV Particle Astrophysics 2019

Dependence of accessible dark matter annihilation cross sections on the density profiles of dSphs

2 Dec 2019, 16:30

20m

SNH 4002 (Messel)

Oral Dark matter Parallel

Speaker

Dr Nagisa Hiroshima (RIKEN)

Description

Dwarf spheroidal galaxies (dSphs) are good target to search for dark matter annihilation signals with gamma-ray observations. For WIMPs lighter than $m_{\mathrm{D}\mathrm{M}}\sim \mathcal{O}(10)$ GeV, the strongest constraints are obtained by Fermi’s observation of dSphs. In the near future, our accessibility to WIMPs heavier than $m_{\mathrm{D}\mathrm{M}}\sim \mathcal{O}(1)$ TeV should be significantly enhanced with Cherenkov Telescope Array (CTA). The importance of the dark matter spatial distribution in dSphs increases because the angular resolution of CTA facilities are much finer than the typical size of dSphs. We evaluate how our accessibility to WIMP depends on the models of dark matter distribution in dSphs and discuss the implications.

Presentation materials

TeVPA2019_hiroshima.pdf