# Self-Interacting Dark Matter Subhalos in the Milky Way's Tides

## TL;DR

This paper investigates how self-interacting dark matter (SIDM) subhalos evolve under the Milky Way's tidal forces, revealing more diverse inner dark matter distributions than cold dark matter models, and compares these predictions with observations of Draco and Fornax.

## Contribution

It demonstrates that SIDM models can explain the diverse dark matter profiles of MW satellites, aligning with observations and extending previous SIDM studies.

## Key findings

- SIDM subhalos show more diverse inner dark matter distributions.
- The model accommodates Draco and Fornax satellite galaxies.
- SIDM explains the diversity in rotation curves of field galaxies.

## Abstract

We study evolution of self-interacting dark matter (SIDM) subhalos in the Milky Way (MW) tidal field. The interaction between the subhalos and the MW's tides lead to more diverse dark matter distribution in the inner region, compared to their cold dark matter counterparts. We test this scenario with two MW satellite galaxies, Draco and Fornax, opposite extremes in the inner dark matter content, and find that they can be accommodated within the SIDM model proposed to explain the diverse rotation curves of spiral galaxies in the field.