Radio and gamma-ray constraints on dark matter annihilation in the Galactic center
RM Crocker, NF Bell, C Balazs, DI Jones
PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2010
We determine upper limits on the dark matter (DM) self-annihilation cross section for scenarios in which annihilation leads to the production of electron-positron pairs. In the Galactic center, relativistic electrons and positrons produce a radio flux via synchroton emission, and a gamma-ray flux via bremsstrahlung and inverse Compton scattering. On the basis of archival, interferometric and single-dish radio data, we have determined the radio spectrum of an elliptical region around the Galactic center of extent 3° semimajor axis (along the Galactic plane) and 1° semiminor axis and a second, rectangular region, also centered on the Galactic center, of extent 1.6°×0.6°. The radio spectra of b..View full abstract
Awarded by Australian Research Council
The authors are indebted to T. Jacques, A. Mazumdar, N. Sahu, and F. Wang for invaluable discussions on various aspects of dark matter models and the indirect detection of dark matter signals. This research was funded in part by the Australian Research Council under Project ID DP0877916 and DP0988343.