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Galactic dark matter search via phenomenological astrophysics modeling · Around

2015

Galactic dark matter search via phenomenological astrophysics modeling

Huang, Xiaoyuan, Enßlin, Torsten, Selig, Marco

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Previous searches for the $\gamma$-ray signatures of annihilating galactic dark matter used predefined spatial templates to describe the background of $\gamma$-ray emission from astrophysical processes like cosmic ray interactions.

In this work, we aim to establish an alternative approach, in which the astrophysical components are identified solely by their spectral and morphological properties.
To this end, we adopt the recent reconstruction of the diffuse $\gamma$-ray sky from Fermi data by the D$^{3}$PO algorithm and the fact that more than 90\% of its flux can be represented by only two spectral components, resulting form the dense and dilute interstellar medium.
Under these presumptions, we confirm the reported DM annihilation-like signal in the inner Galaxy and derive upper limits for dark matter annihilation cross sections.

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