Constraining Dark Matter Signal from a Combined Analysis of Milky Way Satellites with the Fermi-LAT

TL;DR

This paper presents a combined analysis of gamma-ray data from 10 dwarf spheroidal galaxies using Fermi-LAT to improve constraints on dark matter properties, accounting for astrophysical uncertainties.

Contribution

It introduces a joint likelihood analysis method applied to multiple dwarf galaxies, enhancing dark matter search sensitivity and robustness of constraints.

Findings

Stronger limits on dark matter annihilation cross-section.

Effective handling of astrophysical uncertainties.

Demonstrated the power of combined analysis for dark matter searches.

Abstract

Dwarf spheroidal galaxies have a large mass to light ratio and low astrophysical background, and are therefore considered one of the most promising targets for dark matter searches in the gamma-ray band. By applying a joint likelihood analysis, the power of resultant limits in case of no detection can be enhanced and robust constraints on the dark matter parameter space can be obtained. We present results from a combined analysis of 10 dwarf spheroidal galaxies using Fermi-LAT data. Different annihilation channels have been analyzed and uncertainties from astrophysical properties have been taken into account.