Speaker: Anne-Katherine Burns and Max Fieg
The presence of an excess γ-ray signal toward the Galactic Center (GC) has now been well established, and is known as the GC excess. Leading explanations for the signal include mis-modeling of the Galactic diffuse emission along the line of sight, an unresolved population of millisecond pulsars, and/or the annihilation of dark matter (DM). Recently, evidence for another excess γ-ray signal has been reported toward the outer halo of M31. In this talk, we will discuss arxiv:2010.11650 and arxiv:2010.08563, both of which analyze the gamma ray excess in the Milky Way and M31 in the framework of DM annihilation. We will show that the excesses are consistent with models of DM annihilation for both two body and four body annihilation modes.