Jul 22 – 27, 2018
US/Eastern timezone

Multiwavelength analysis of annihilating dark matter as the origin of the gamma-ray emission from M31

Jul 27, 2018, 3:20 PM


Talk Indirect Detection 5.4 Indirect Detection


Mr Alex McDaniel (University of California, Santa Cruz)


Indirect detection of dark matter through multiwavelength astronomical observations provides a promising avenue for understanding the particle nature of dark matter. In the case of dark matter consisting of weakly-interacting massive particles (WIMPs), self-annihilation ultimately produces a variety of observable products including gamma-rays that can be detected directly, as well as electron/positron pairs that can be detected by radio emission from synchrotron radiation, or X-rays and soft gamma rays from inverse Compton scattering. A major focus of study for astrophysical signs of dark matter is in the Galactic center (GC) of the Milky Way, due in large part to an observed excess of gamma-rays that could be dark matter. A recent observation by the Fermi-LAT collaboration of a similar gamma-ray excess in the central region of the Andromeda galaxy (M31) leads us to explore the possibility of a dark matter-induced signal in that system as well. In this talk, I will present the results from a multi-frequency analysis of dark matter annihilation as a potential source of the emissions in M31, discussing the relevant astrophysical modeling, and considering these results in relation to galactic center dark matter studies.

Primary author

Mr Alex McDaniel (University of California, Santa Cruz)

Presentation materials