Resolving small-scale cold circumgalactic gas in TNG50

@article{Nelson2020ResolvingSC,
  title={Resolving small-scale cold circumgalactic gas in TNG50},
  author={D. Nelson and Prateek Sharma and A. Pillepich and V. Springel and R. Pakmor and R. Weinberger and M. Vogelsberger and F. Marinacci and L. Hernquist},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020},
  volume={498},
  pages={2391-2414}
}
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… Expand
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