2014

Neutral hydrogen in galaxy halos at the peak of the cosmic star formation history

Faucher-Giguere, C. -A., Hopkins, P. F., Keres, D. et al.

Understand

We use high-resolution cosmological zoom-in simulations from the FIRE project to make predictions for the covering fractions of neutral hydrogen around galaxies at z=2-4.

  • These simulations resolve the interstellar medium of galaxies and explicitly implement a comprehensive set of stellar feedback mechanisms.
  • Our simulation sample consists of 16 main halos covering the mass range M_h~10^9-6x10^12 Msun at z=2, including 12 halos in the mass range M_h~10^11-10^12 Msun corresponding to Lyman break galaxies (LBGs).
  • We process our simulations with a ray tracing method to compute the ionization state of the gas.

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