Dark matter annihilation and decay profiles for the Reticulum II dwarf spheroidal galaxy

Understand

The dwarf spheroidal galaxies (dSph) of the Milky Way are among the most attractive targets for indirect searches of dark matter.

• In this work, we reconstruct the dark matter annihilation (J-factor) and decay profiles for the newly discovered dSph Reticulum II.
• Using an optimized spherical Jeans analysis of kinematic data obtained from the Michigan/Magellan Fiber System (M2FS), we find Reticulum II's J-factor to be among the largest of any Milky Way dSph.
• We have checked the robustness of this result against several ingredients of the analysis.