{
  "id": "1706.06605",
  "version": "v1",
  "published": "2017-06-20T18:00:32.000Z",
  "updated": "2017-06-20T18:00:32.000Z",
  "title": "Simulating galaxies in the reionization era with FIRE-2: galaxy scaling relations, stellar mass functions, and luminosity functions",
  "authors": [
    "Xiangcheng Ma",
    "Philip F. Hopkins",
    "Shea Garrison-Kimmel",
    "Claude-André Faucher-Giguère",
    "Eliot Quataert",
    "Michael Boylan-Kolchin",
    "Christopher C. Hayward",
    "Robert Feldmann",
    "Dušan Kereš"
  ],
  "comment": "21 pages, 17 figures, submitted to MNRAS, comments welcome. The predicted stellar mass functions and luminosity functions are made publicly available (see Appendix A for details)",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We present a suite of cosmological zoom-in simulations at z>5 from the Feedback In Realistic Environments project, spanning a halo mass range M_halo~10^8-10^12 M_sun at z=5. We predict the stellar mass-halo mass relation, stellar mass function, and luminosity function in several bands from z=5-12. The median stellar mass-halo mass relation does not evolve strongly at z=5-12. The faint-end slope of the luminosity function steepens with increasing redshift, as inherited from the halo mass function at these redshifts. Below z~6, the stellar mass function and ultraviolet (UV) luminosity function slightly flatten below M_star~10^4.5 M_sun (fainter than M_1500~-14), owing to the fact that star formation in low-mass halos is suppressed by the ionizing background by the end of reionization. Such flattening does not appear at higher redshifts. We provide redshift-dependent fitting functions for the SFR-M_halo, SFR-M_star, and broad-band magnitude-stellar mass relations. We derive the star formation rate density and stellar mass density at z=5-12 and show that the contribution from very faint galaxies becomes more important at z>8. Furthermore, we find that the decline in the z~6 UV luminosity function brighter than M_1500~-20 is largely due to dust attenuation. Approximately 37% (54%) of the UV luminosity from galaxies brighter than M_1500=-13 (-17) is obscured by dust at z~6. Our results broadly agree with current data and can be tested by future observations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-06-20T18:00:32.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "stellar mass function",
      "luminosity function",
      "galaxy scaling relations",
      "reionization era",
      "simulating galaxies"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}