Non-thermal X-rays from the Ophiuchus galaxy cluster and dark matter annihilation
arXiv:0801.0740 · doi:10.1103/PhysRevD.77.103510
Abstract
We investigate a scenario where the recently discovered non-thermal hard X-ray emission 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 scenario can account for both the X-ray and the radio emission, provided the average magnetic field is of the order of 0.1 microGauss. 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 photons.
6 pages, 4 figures, matches published version
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- Conservative Constraints on Dark Matter Annihilation into Gamma Rays
- Gamma Rays from Clusters and Groups of Galaxies: Cosmic Rays versus Dark Matter
- Extragalactic Inverse Compton Light from Dark Matter Annihilation and the Pamela Positron Excess
- Searching for Dark Matter with X-ray Observations of Local Dwarf Galaxies
- Galaxy Clusters as Reservoirs of Heavy Dark Matter and High-Energy Cosmic Rays: Constraints from Neutrino Observations
- Neutrinos in IceCube/KM3NeT as probes of Dark Matter Substructures in Galaxy Clusters
- Toward a Minimum Branching Fraction for Dark Matter Annihilation into Electromagnetic Final States
- Multi-wavelength Searches for Particle Dark Matter