No gamma-ray excess was found in H.E.S.S. observations of five DES ultra-faint dwarf galaxies, yielding competitive 95% confidence upper limits on dark matter annihilation in the TeV mass range.
Dark matter annihilation and decay profiles for the Reticulum II dwarf spheroidal galaxy
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
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. Unless it suffers from tidal disruption or significant inflation of its velocity dispersion from binary stars, Reticulum II may provide a unique window on dark matter particle properties.
fields
astro-ph.HE 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
citing papers explorer
-
Dark Matter search with H.E.S.S. towards ultra-faint dwarf nearby DES satellites of the Milky Way
No gamma-ray excess was found in H.E.S.S. observations of five DES ultra-faint dwarf galaxies, yielding competitive 95% confidence upper limits on dark matter annihilation in the TeV mass range.