Constraints on dark matter annihilation from M87 |
| |
Authors: | Sheetal Saxena Alexander Summa Dominik Elsässer Michael Rüger Karl Mannheim |
| |
Institution: | 1.Institute for Theoretical Physics and Astrophysics,University of Würzburg,Würzburg,Germany |
| |
Abstract: | As the largest mass concentrations in the local Universe, nearby clusters of galaxies and their central galaxies are prime
targets in searching for indirect signatures of dark matter annihilation (DMA). We seek to constrain the dark matter annihilation
emission component from multi-frequency observations of the central galaxy of the Virgo cluster. The annihilation emission
component is modeled by the prompt and inverse-Compton gamma rays from the hadronization of annihilation products from generic
weakly interacting dark matter particles. This component is fitted to the excess of the observed data above the spectral energy
distribution (SED) of the jet in M87, described with a best-fit synchrotron-self-Compton (SSC) spectrum. While this result
is not sufficiently significant to claim a detection, we emphasize that a dark matter “double hump signature” can be used
to unambiguously discriminate the dark matter emission component from the variable jet-related emission of M87 in future,
more extended observation campaigns. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|