Young Pulsars and the Galactic Center GeV Gamma-ray Excess
High Energy Astrophysical Phenomena
2015-04-15 v1 Astrophysics of Galaxies
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
Studies of Fermi data indicate an excess of GeV gamma rays around the Galactic center (GC), possibly due to dark matter. We show that young gamma-ray pulsars can yield a similar signal. First, a high concentration of GC supernovae naturally leads to a population of kicked pulsars symmetric about the GC. Second, while very-young pulsars with soft spectra reside near the Galactic plane, pulsars with spectra that have hardened with age accumulate at larger angles. This combination, including unresolved foreground pulsars, traces the morphology and spectrum of the Excess.
Keywords
Cite
@article{arxiv.1504.02477,
title = {Young Pulsars and the Galactic Center GeV Gamma-ray Excess},
author = {Ryan M. O'Leary and Matthew D. Kistler and Matthew Kerr and Jason Dexter},
journal= {arXiv preprint arXiv:1504.02477},
year = {2015}
}
Comments
Submitted to PRL