Title: Simulating Atomic Dark Matter in Milky Way Analogues: The Impact of Dark Dissipation on Galactic Scales
Abstract: Dark sector theories naturally lead to multi-component scenarios for dark matter where a sub-component can dissipate energy through self-interactions, allowing it to efficiently cool inside galaxies. In this talk, I'll present the first cosmological hydrodynamical simulations of Milky Way (MW) analogues where the majority of dark matter is collisionless Cold Dark Matter (CDM), but a sub-component (6%) is strongly dissipative minimal Atomic Dark Matter (ADM). The simulations demonstrate that the addition of even a small fraction of dissipative dark matter can significantly impact galactic evolution and substructure despite being consistent with current cosmological constraints. I'll show that ADM gas with roughly Standard-Model-like masses and couplings can cool to form rotating "dark disks", gravitationally collapse into dark compact subhalos and enhance the central densities of the host MW-like halo and its subhalos. These effects will significantly impact galactic observables.
For help, please contact Webmaster.