Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 62: Cosmic Rays III
T 62.1: Vortrag
Mittwoch, 18. März 2026, 16:15–16:30, KS 00.006
Time Dependant Modelling of Astrophysical and DM Secondary Signatures in Dwarf Galaxies — •Jannis Wagner1,2, Julien Dörner1,2, Athithya Aravinthan1,2, Milena Brütting1,2, and Julia Becker Tjus1,2,3 — 1Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany — 2Ruhr Astroparticle and Plasma Physics Center (RAPP Center), Germany — 3Department of Space, Earth and Environment, Chalmers University of Technology, 412 96 Gothenburg, Sweden
Dwarf galaxies are increasingly gaining traction as targets of indirect searches for Dark Matter (DM) due to their high mass-to-light ratios and low star-formation rates. Searches mainly focus on gamma rays in the GeV-TeV range created through different annihilation channels of Weakly Interacting Massive Particles (WIMPs). These signals are distorted by radiative emission of astrophysical Cosmic Rays (CRs), which necessitates joint modelling. Furthermore, the galaxies’ decline in star-formation rate and its feedback on the galactic magnetic field require a time-dependent modelling of the CR distribution. Such a modelling would allow for better gauging of the morphological impact of DM and thus support future observation attempts for evidence of DM or in setting stronger constraints on its characteristics.
In this work, we explore this coupled modelling using the Monte-Carlo framework CRPropa, including leptonic DM secondaries and astrophysical CR electrons. We present a comparison of the morphologies of the resulting signatures for basic models of source distribution and magnetic field evolution.
Keywords: dark matter; dwarf galaxies; galactic magnetic fields; cosmic rays