Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 110: Search for Dark Matter 5

T 110.5: Talk

Friday, March 8, 2024, 10:00–10:15, Geb. 30.22: Gaede-HS

Modeling of self-interacting dark matter signatures in dwarf galaxies — •Athithya Aravinthan^{1, 2}, Julia Becker Tjus^{1, 2, 3}, and Lukas Merten^{1, 2} — ¹Theoretische Physik IV, Ruhr-Universität Bochum, Bochum, Germany — ²RAPP-Center, Ruhr-Universität Bochum, Bochum, Germany — ³Department of Space, Earth and Environment, Chalmers University of Technology, 412 96 Gothenburg, Sweden

Dwarf galaxies are a convenient testing ground in the search for Dark Matter (DM), due to their low, astrophysical background of electromagnetic emission in radio and gamma rays. While multi-messenger signatures of dwarf galaxies can lead to a more precise estimation of the astrophysical background, the modelling of the expected DM annihilation signals, and therefore the DM foreground, is necessary to derive constraints on DM parameters.

In this work, based on the J-factor, which describes the distribution of DM, the gamma-ray fluxes from DM annihilation in several dwarf spheroidal galaxies are determined. This is done using varying DM masses, distributions, and J-factor models, such as the canonical case for cold DM and the generalized case for self-interacting DM. *Supported by DFG (SFB 1491).

Keywords: dark matter; gamma ray signatures; self-interacting dark matter; dwarf galaxies