{
  "id": "1708.07628",
  "version": "v1",
  "published": "2017-08-25T06:51:43.000Z",
  "updated": "2017-08-25T06:51:43.000Z",
  "title": "The host dark matter halos of [OII] emitters at 0.5< z< 1.5",
  "authors": [
    "V. Gonzalez-Perez",
    "J. Comparat",
    "P. Norberg",
    "C. M. Baugh",
    "S. Contreras",
    "C. Lacey",
    "N. McCullagh",
    "A. Orsi",
    "J. Helly",
    "J. Humphries"
  ],
  "comment": "17 pages, 16 figures, submitted to MNRAS, includes the first refeere's comments",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "Emission line galaxies (ELGs) are used in several ongoing and upcoming surveys as tracers of the dark matter distribution. Using a new galaxy formation model, we explore the characteristics of [OII] emitters, which dominate optical ELG selections at $z\\simeq 1$. Model [OII] emitters at $0.5<z<1.5$ are selected to mimic the DEEP2, VVDS, eBOSS and DESI surveys. The luminosity functions of model [OII] emitters are in reasonable agreement with observations. The selected [OII] emitters are hosted by haloes with $M_{\\rm halo}\\geq 10^{10.5}h^{-1}{\\rm M}_{\\odot}$, with $\\sim 90$% of them being central star-forming galaxies. The predicted mean halo occupation distributions of [OII] emitters has a shape typical of that inferred for star-forming galaxies, with the contribution from central galaxies, $<N>_{[OII],cen}$, being far from the canonical step function. The $<N>_{[OII],cen}$ can be described as the sum of an asymmetric Gaussian for disks and a step function for spheroids, which plateaus below unity. The model [OII] emitters have a clustering bias close to unity, which is below the expectations for eBOSS and DESI ELGs. At $z\\sim 1$, a comparison with observed g-band selected galaxy, which are expected to be dominated by [OII] emitters, indicates that our model produces too few [OII] emitters that are satellite galaxies. This suggests the need to revise our modelling of hot gas stripping in satellite galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-08-25T06:51:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "host dark matter halos",
      "satellite galaxies",
      "predicted mean halo occupation distributions",
      "step function",
      "galaxy formation model"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}