Dwarf spheroidal satellites: are they of tidal origin?

  title={Dwarf spheroidal satellites: are they of tidal origin?},
  author={Martin Kroupa},
  journal={Monthly Notices of the Royal Astronomical Society},
  • M. Kroupa
  • Published 10 January 2007
  • Physics
  • Monthly Notices of the Royal Astronomical Society
The Milky Way and Andromeda must have formed through an initial epoch of substructure merging. As a result of fundamental physical conservation laws tidal-dwarf galaxies (TDGs) have likely been produced. Here we show that such TDGs appear, after a Hubble-time of dynamical evolution in the host dark-matter halo, as objects that resemble known dSph satellite galaxies. We discuss the possibility that some of the Milky Way’s satellites may be of tidal origin. 

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