Searching for the continuum spectrum photons correlated to the 130 GeV gamma-ray line

Abstract

Indications for a gamma-ray line(s) signal towards the Galactic center at an energy of about 130 GeV have been recently presented. While dark matter annihilations are a viable candidate for this signal, it is generally expected that such a flux would be correlated to a gamma-ray component with continuum energy spectrum due to dark matter pair annihilating into other Standard Model particles. We use the gamma-ray data from the inner 10 x 10 degree window to derive limits for a variety of DM annihilation final states. Extending the window of observation, we discuss bounds on the morphological shape of a dark matter signal associated to the line, applying both standard templates for the dark matter profile, such as an Einasto or a NFW profile, and introducing a new more general parametrization.

9 pages, 6 figures and 1 table, corrected typographical errors, added citations and journal reference

References in corpus (4)

• Giant Gamma-ray Bubbles from Fermi-LAT: AGN Activity or Bipolar Galactic Wind?
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• Gamma-ray Lines in the Fermi Data: is it a Bubble?
• Three Dimensional Distribution of Atomic Hydrogen in the Milky Way

Cited by in corpus (5)

• Loop-induced dark matter direct detection signals from gamma-ray lines
• Three Exceptions for Thermal Dark Matter with Enhanced Annihilation to Gamma Gamma
• Galactic Center Radio Constraints on Gamma-Ray Lines from Dark Matter Annihilation
• The 130 GeV Fingerprint of Right-Handed Neutrino Dark Matter
• Axino dark matter with R-parity violation and 130 GeV gamma-ray line