Indirect evidence of GeV dark matter.
Abstract
Recently, an excess of GeV gamma-ray near the Galactic Centre has been reported. The spectrum obtained can be best fitted with the annihilation of 30-40 GeV dark matter particles through b bar{b} channel. In this Letter, I show that this annihilation model can also solve the mysteries of heating source in X-ray plasma and the unexpected high gamma-ray luminosity. The cross-section constrained by these observations give excellent agreements with both the predicted range by using Fermi-Large Area Telescope (LAT) data and the canonical thermal relic abundance cross-section.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- March 2015
- DOI:
- 10.1093/mnrasl/slv005
- arXiv:
- arXiv:1501.02043
- Bibcode:
- 2015MNRAS.448L..87C
- Keywords:
-
- dark matter;
- gamma-rays: galaxies;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- Accepted by MNRAS Letters