Reticulum 2 - gamma ray emissions

[jim mcnamara]

http://arxiv.org/pdf/1503.02320v1.pdf

This paper discusses the emission of gamma rays from a neighboring dwarf galaxy. My understanding is that there is no conventional explanation of gamma ray emission. So there is interest in pursuing a possibility that these emissions are from dark matter interactions.
Quote:'we detect a signal that exceeds expected backgrounds between
2 10 GeV and is consistent with annihilation of dark matter for particle masses less than a few
10^2 GeV.'

 

[space-time]

Feel free to look further into this for I am not a professional, but perhaps dark matter has anti-matter counter particles that are annihilating with the dark matter as the paper implies. Sorry if this answer is too basic.