Non-thermal X-rays from the Ophiuchus galaxy cluster and dark matter annihilation

摘要

We investigate a scenario where the recently discovered non-thermal hard X-ray emis-sion from the Ophiuchus cluster originates from inverse Compton scattering of energetic electrons and positrons produced in weakly interacting dark matter pair annihilations. We show that this sce-nario can account for the detected X-ray emission. We demonstrate that GLAST will conclusively test the dark matter annihilation hypothesis. Depending on the particle dark matter model, GLAST might even detect the monochromatic line produced by dark matter pair annihilation into two pho-tons.