Corpus ID: 218720005

Resolving small-scale cold circumgalactic gas in TNG50

  title={Resolving small-scale cold circumgalactic gas in TNG50},
  author={Dylan Nelson and Prateek Sharma and Annalisa Pillepich and Volker Springel and R{\"u}diger Pakmor and Rainer Weinberger and Mark Vogelsberger and Federico Marinacci and Lars Hernquist},
  journal={arXiv: Astrophysics of Galaxies},
  • Dylan Nelson, Prateek Sharma, +6 authors Lars Hernquist
  • Published 2020
  • Physics
  • arXiv: Astrophysics of Galaxies
  • We use the high-resolution TNG50 cosmological magnetohydrodynamical simulation to explore the properties and origin of cold circumgalactic medium (CGM) gas around massive galaxies (M* > 10^11 Msun) at intermediate redshift (z~0.5). We discover a significant abundance of small-scale, cold gas structure in the CGM of 'red and dead' elliptical systems, as traced by neutral HI and MgII. Halos can host tens of thousands of discrete absorbing cloudlets, with sizes of order a kpc or smaller. With a… CONTINUE READING