{
  "id": "1503.00004",
  "version": "v1",
  "published": "2015-02-27T21:00:10.000Z",
  "updated": "2015-02-27T21:00:10.000Z",
  "title": "Evolution of the H$β$+[OIII] and [OII] luminosity functions and the [OII] star-formation history of the Universe up to $z$ ~ 5 from HiZELS",
  "authors": [
    "Ali Ahmad Khostovan",
    "David Sobral",
    "Bahram Mobasher",
    "Philip N. Best",
    "Ian Smail",
    "John P. Stott",
    "Shoubaneh Hemmati",
    "Hooshang Nayyeri"
  ],
  "comment": "23 pages, 14 figures, 7 Tables, submitted to MNRAS",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We investigate the evolution of the H$\\beta$+[OIII] and [OII] luminosity functions from $z$ ~ 0.8 to ~ 5 in multiple redshift slices using data from the High-$z$ Emission Line Survey (HiZELS). This is the first time that the H$\\beta$+[OIII] and [OII] luminosity functions have been studied at these redshifts in a self-consistent analysis. This is also the largest sample of [OII] and H$\\beta$+[OIII] emitters (3484 and 3301 emitters, respectively) in this redshift range, with large co-moving volumes ~ $1 \\times 10^6$ Mpc$^{3}$ in two independent volumes (COSMOS and UDS), greatly reducing the effects of cosmic variance. The emitters were selected by a combination of photometric redshift and color-color selections, as well as spectroscopic follow-up, including recent spectroscopic observations using DEIMOS and MOSFIRE on the Keck Telescopes and FMOS on Subaru. We find a strong increase in $L_\\star$ and a decrease in $\\phi_\\star$ with increasing redshift up to $z \\sim 2$ and $z \\sim 5$ for H$\\beta$+[OIII] and [OII] emitters, respectively. For H$\\beta$+[OIII], this evolution then flattens by $z$ ~ 3. We derive the [OII] star-formation history of the Universe since $z$ ~ 5 and find that the cosmic SFRD rises from $z$ ~ 5 to ~ 3 and then drops towards $z$ ~ 0. We also find that our star-formation history is able to reproduce the evolution of the stellar mass density up to $z$ ~ 5. When comparing the H$\\beta$+[OIII] SFRDs to the [OII] and H$\\alpha$ SFRD measurements in the literature, we find that there is a remarkable agreement, suggesting that the H$\\beta$+[OIII] sample is dominated by star-forming galaxies at high-$z$ rather than AGNs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-02-27T21:00:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "luminosity functions",
      "star-formation history",
      "multiple redshift slices",
      "stellar mass density",
      "emission line survey"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}