Dark matter spectra?

NGC 1275 the galaxy at the center of the Perseus galaxy cluster.

http://www.sciencedaily.com/releases/2014/02/140226074829.htm

Astrophysicist Alexey Boyarsky and his researchers believe they have discovered indirect evidence of a new particle. The team is calling this new particle the sterile neutrino and they say that it is responsible for a hidden spike in the x-ray part of the spectra of the Perseus galaxy cluster. This spectral line apparently cannot be explained by any known atomic transition frequency. This spectral line has also been seen by Boyarsky in the nearby Andromeda galaxy as well as by a team at Harvard in many other galaxy clusters. The spectral line is attributed to the decay of this sterile neutrino which gets its name because it does not interact with other neutrinos. The sterile neutrino does have mass however and Boyarsky and his team have hope that this particle may be able to explain dark matter. The sterile neutrino is an appealing candidate for dark matter because it would only require a small modification to the standard model.