Munich Dark Matter Meeting - Moritz Fischer

Tuesday 29 Apr 2025, 12:30 → 13:30 Europe/Berlin

A.2.25/27 - Atlas (New)

Challenges in astrophysical simulations of dark matter interactions with itself and baryons

 

Remote access via zoom: https://zoom.us/j/93858139672?pwd=NkNPZ1ltY2xnT2E1bS94M3VBZ1JUQT09 (Meeting ID: 938 5813 9672, Passcode: 522402)

 

https://wwwmpa.mpa-garching.mpg.de/darkmatter/

Abstract:

Astrophysical probes allow us to constrain non-gravitational dark matter (DM) interactions by studying their impact on the distribution of both DM and baryons. Being able to accurately model these interactions at low redshift can be crucial. A standard method is N-body simulations that incorporate the additional particle physics of the dark sector. However, certain models present significant challenges, particularly those driving DM halos into gravothermal collapse or featuring DM-baryon scattering. In this talk, I will discuss these challenges and strategies to overcome them. In particular, I will present work on self-interacting DM simulations of DM halos undergoing gravothermal collapse, as well as the first N-body simulations of halo formation with DM-baryon scattering.