The diverse evolutionary paths of simulated high-z massive, compact galaxies to z = 0

  title={The diverse evolutionary paths of simulated high-z massive, compact galaxies to z = 0},
  author={Sarah Wellons and Paul Torrey and Chung-Pei Ma and Vicente Rodriguez-Gomez and Annalisa Pillepich and Dylan Nelson and Shy Genel and Mark Vogelsberger and Lars Hernquist},
  journal={Monthly Notices of the Royal Astronomical Society},
Massive quiescent galaxies have much smaller physical sizes at high redshift than today. The strong evolution of galaxy size may be caused by progenitor bias, major and minor mergers, adiabatic expansion, and/or renewed star formation, but it is difficult to test these theories observationally. Herein, we select a sample of 35 massive, compact galaxies (M_* = 1–3 × 10^(11) M_⊙, M_*/R^(1.5) > 10^(10.5) M_⊙/kpc^(1.5)) at z = 2 in the cosmological hydrodynamical simulation Illustris and trace them… 

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