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

TL;DR

This paper investigates the gamma-ray line at 130 GeV near the Galactic center, analyzing continuum spectrum correlations and dark matter annihilation models to understand the potential dark matter origin of the signal.

Contribution

It introduces new bounds on the shape of dark matter signals and extends analysis methods to include more general dark matter density profiles.

Findings

Limits on dark matter annihilation final states derived from gamma-ray data.

Constraints on the morphological shape of dark matter signals using various profiles.

Discussion of bounds on the dark matter signal's spatial distribution.

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.