The onset of gravothermal core collapse in velocity-dependent self-interacting dark matter subhaloes

  title={The onset of gravothermal core collapse in velocity-dependent self-interacting dark matter subhaloes},
  author={Hannah C Turner and Mark R. Lovell and Jes{\'u}s Zavala and Mark Vogelsberger},
  journal={arXiv: Astrophysics of Galaxies},
It has been proposed that gravothermal collapse due to dark matter self-interactions (i.e. self-interacting dark matter, SIDM) can explain the observed diversity of the Milky Way (MW) satellites' central dynamical masses. We investigate the process behind this hypothesis using an $N$-body simulation of a MW-analogue halo with velocity dependent self-interacting dark matter (vdSIDM) in which the low velocity self-scattering cross-section, $\sigma_\rmn{T}/m_\rmn{x}$, reaches 100$~$cm$^{2}$g$^{-1… 

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  • Physics
    The Astrophysical Journal Letters
  • 2022
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