{
  "id": "1905.02759",
  "version": "v1",
  "published": "2019-05-07T18:29:20.000Z",
  "updated": "2019-05-07T18:29:20.000Z",
  "title": "Dark-ages Reionization and Galaxy Formation Simulation - XIX: Predictions of infrared excess and cosmic star formation rate density from UV observations",
  "authors": [
    "Yisheng Qiu",
    "Simon J. Mutch",
    "Elisabete da Cunha",
    "Gregory B. Poole",
    "J. Stuart B. Wyithe"
  ],
  "comment": "15 pages, 10 figure. Submited to MNRAS",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present a new analysis of high-redshift UV observations using a semi-analytic galaxy formation model, and provide self-consistent predictions of the infrared excess (IRX) - $\\beta$ relations and cosmic star formation rate density. We combine the Charlot & Fall dust attenuation model with the Meraxes semi-analytic model, and explore three different parametrisations for the dust optical depths, linked to star formation rate, dust-to-gas ratio and gas column density respectively. A Bayesian approach is employed to statistically calibrate model free parameters including star formation efficiency, mass loading factor, dust optical depths and reddening slope directly against UV luminosity functions and colour-magnitude relations at z ~ 4 - 7. The best-fit models show excellent agreement with the observations. We calculate IRX using energy balance arguments, and find that the large intrinsic scatter in the IRX -$\\beta$ plane is driven by the specific star formation rate. Additionally, the difference among the three dust models suggests a factor of two systematic uncertainty in the dust-corrected star formation rate when using the Meurer IRX - $\\beta$ relation at z > 4.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-05-07T18:29:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cosmic star formation rate density",
      "galaxy formation simulation",
      "uv observations",
      "infrared excess",
      "calibrate model free parameters"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}