The properties of brown dwarfs and low-mass hydrogen-burning stars formed by disc fragmentation

  title={The properties of brown dwarfs and low-mass hydrogen-burning stars formed by disc fragmentation},
  author={Dimitris Stamatellos and Anthony Peter Whitworth},
  journal={Monthly Notices of the Royal Astronomical Society},
We suggest that a high proportion of brown dwarf (BD) stars are formed by gravitational fragmentation of massive extended discs around Sun-like primary stars. We argue that such discs should arise frequently, but should be observed infrequently, precisely because they fragment rapidly. By performing an ensemble of radiation-hydrodynamic simulations, we show that such discs typically fragment within a few thousand years, and produce mainly BD stars, but also planetary-mass (PM) stars and very… Expand
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