Subhalo sinking and off-centre massive black holes in dwarf galaxies

  title={Subhalo sinking and off-centre massive black holes in dwarf galaxies},
  author={Pierre Boldrini and Roya Mohayaee and Joseph I. Silk},
  journal={Monthly Notices of the Royal Astronomical Society},
Using fully GPU $N$-body simulations, we demonstrate for the first time that subhalos sink and transfer energy via dynamical friction into the centres of dwarf galaxies. This dynamical heating kicks any central massive black hole (MBH) out to tens of parsecs, especially at early epochs ($z$=1.5-3). This mechanism helps explain the observed off-center BHs in dwarf galaxies and also predicts that off-center BHs are more common in higher mass dwarf galaxies since dynamical friction becomes… Expand

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