Illuminating the 130 GeV Gamma Line with Continuum Photons
Abstract
There is evidence for a 130 GeV gamma-ray line at the Galactic Center in the Fermi Large Area Telescope data. Dark matter candidates that explain this feature should also annihilate to Standard Model particles, resulting in a continuous spectrum of photons. To study this continuum, we analyze the Fermi data down to 5 GeV, restricted to the inner 3 degrees of the Galaxy. We place a strong bound on the ratio of continuum photons to monochromatic line photons that is independent of uncertainties in the dark matter density profile. The derived constraints exclude neutralino dark matter as an explanation for the line.
Cite
@article{arxiv.1207.0800,
title = {Illuminating the 130 GeV Gamma Line with Continuum Photons},
author = {Timothy Cohen and Mariangela Lisanti and Tracy R. Slatyer and Jay G. Wacker},
journal= {arXiv preprint arXiv:1207.0800},
year = {2015}
}
Comments
14+10 pages, 11 figures, 3 appendices; v2 refs added, additional final states included; v3 minor difference in data selection criteria, conclusions unchanged; v4 journal version