Skip to main content
SearchLogin or Signup

The shapes of Milky-Way-mass galaxies with Self-Interacting Dark Matter

Published onJun 01, 2020
The shapes of Milky-Way-mass galaxies with Self-Interacting Dark Matter

The cold dark matter plus dark energy (ΛCDM) cosmological model has been successful at reproducing the large-scale structure of the Universe. However, on length scales smaller than ~1 Mpc and halo masses smaller than ~1011 M, this framework is challenged by observations that halos are less centrally dense than predicted. One way to reconcile these observations with theoretical predictions, without affecting the large-scale structure, is to consider self-interacting dark matter (SIDM) models. In order to incorporate the effects of both baryonic and SIDM interactions, we use the Feedback in Realistic Environments (FIRE-2) suite of Milky-Way-mass galaxies on a cosmological background and compare the shapes of the main dark matter halo predicted by SIDM simulations (at interaction cross-sections σ/m of 1 and 10 cm2 g-1) with CDM simulations using the same initial conditions.

Comments
0
comment

No comments here