{
  "id": "1409.7695",
  "version": "v1",
  "published": "2014-09-26T20:00:08.000Z",
  "updated": "2014-09-26T20:00:08.000Z",
  "title": "Cosmic Web and Star Formation Activity in Galaxies at z~1",
  "authors": [
    "Behnam Darvish",
    "David Sobral",
    "Bahram Mobasher",
    "Nicholas Scoville",
    "Philip Best",
    "Laura Sales",
    "Ian Smail"
  ],
  "comment": "15 pages, 11 figures, Accepted for publication in the ApJ",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We investigate the role of the delineated cosmic web/filaments on the star formation activity by exploring a sample of 425 narrow-band selected H{\\alpha} emitters, as well as 2846 color-color selected underlying star-forming galaxies for a large scale structure (LSS) at z=0.84 in the COSMOS field from the HiZELS survey. Using the scale-independent Multi-scale Morphology Filter (MMF) algorithm, we are able to quantitatively describe the density field and disentangle it into its major components: fields, filaments and clusters. We show that the observed median star formation rate (SFR), stellar mass, specific star formation rate (sSFR), the mean SFR-Mass relation and its scatter for both H{\\alpha} emitters and underlying star-forming galaxies do not strongly depend on different classes of environment, in agreement with previous studies. However, the fraction of H{\\alpha} emitters varies with environment and is enhanced in filamentary structures at z~1. We propose mild galaxy-galaxy interactions as the possible physical agent for the elevation of the fraction of H{\\alpha} star-forming galaxies in filaments. Our results show that filaments are the likely physical environments which are often classed as the \"intermediate\" densities, and that the cosmic web likely plays a major role in galaxy formation and evolution which has so far been poorly investigated.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-09-26T20:00:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "star formation activity",
      "cosmic web",
      "selected underlying star-forming galaxies",
      "specific star formation rate",
      "scale-independent multi-scale morphology filter"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/796/1/51",
      "journal": "The Astrophysical Journal",
      "year": 2014,
      "month": "Nov",
      "volume": 796,
      "number": 1,
      "pages": 51
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014ApJ...796...51D"
    }
  }
}