Bibhushan Shakya (Cornell University)
Satellite dwarf galaxies in the vicinity of the Milky Way are ideal candidates for the detection of dark matter annihilation signals. If the positron fraction and combined electron positron ﬂux excesses recently observed by PAMELA and FERMI are due to dark matter annihilation, ground-based atmospheric cherenkov telescopes (ACTs) may be able to observe energetic gamma rays from the accompanying ﬁnal state radiation from these dwarf galaxies. After discussing the prospects of detecting such signals with current and future ACTs, we investigate the possibility of using ACT observations of dwarf galaxies to distinguish between diﬀerent dark matter models from the energy distribution of this ﬁnal state radiation. We ﬁnd that this can reliably be accomplished with next generation ACTs and, under favorable circumstances, might also be possible at existing instruments.
Bibhushan Shakya (Cornell University) Maxim Perelstein (Cornell University)