Robust identification of isotropic diffuse gamma rays from galactic dark matter

Area of Science:

• Astrophysics
• Particle Physics
• Cosmology

Background:

• Dark matter annihilation in Galactic substructure creates diffuse gamma-ray emission.
• This signal is difficult to distinguish from the extragalactic gamma-ray background.
• The Fermi Gamma-ray Space Telescope observes gamma rays in an accessible energy range.

Purpose of the Study:

• To develop a method for disentangling Galactic dark matter signals from background noise.
• To identify gamma rays originating from Galactic dark matter substructure.

Main Methods:

• Analyzing the energy dependence of the angular power spectrum of gamma-ray emissions.
• Utilizing data from the Fermi Gamma-ray Space Telescope.

Main Results:

• The energy dependence of the angular power spectrum can be used to identify Galactic dark matter signals.
• A modest contribution of Galactic dark matter to the observed emission is sufficient for detection.

Conclusions:

• The proposed method offers a promising approach to detect dark matter.
• This technique could confirm the presence and distribution of dark matter in Galactic substructure.