Brown dwarf formation by gravitational fragmentation of massive, extended protostellar discs

  title={Brown dwarf formation by gravitational fragmentation of massive, extended protostellar discs},
  author={D. Stamatellos and D. Hubber and A. Whitworth},
  journal={Monthly Notices of the Royal Astronomical Society: Letters},
We suggest that low-mass hydrogen-burning stars like the Sun should sometimes form with massive extended discs, and we show, by means of radiation hydrodynamic simulations, that the outer parts of such discs (R≳ 100 au) are likely to fragment on a dynamical time-scale (103 to 104 yr), forming low-mass companions: principally brown dwarfs (BDs), but also very low-mass hydrogen-burning stars and planetary-mass objects. A few of the BDs formed in this way remain attached to the primary star… Expand

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