Wet Disc Contraction to Galactic Blue Nuggets and Quenching to Red Nuggets

  title={Wet Disc Contraction to Galactic Blue Nuggets and Quenching to Red Nuggets},
  author={Avishai Dekel and Andreas Burkert},
  journal={Monthly Notices of the Royal Astronomical Society},
  • A. Dekel, A. Burkert
  • Published 3 October 2013
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We study the origin of high-redshift, compact, quenched spheroids (red nuggets) through the dissipative shrinkage of gaseous discs into compact star-forming systems (blue nuggets). The discs, fed by cold streams, undergo violent disc instability (VDI) that drives gas into the centre (along with mergers). The inflow is dissipative when its timescale is shorter than the star formation timescale. This implies a threshold of 0.28 in the cold-to-total mass ratio within the disc radius. For the… 

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