{
  "id": "2310.17701",
  "version": "v1",
  "published": "2023-10-26T18:00:37.000Z",
  "updated": "2023-10-26T18:00:37.000Z",
  "title": "Confirmation of a Substantial Discrepancy between Radio and UV--IR Measures of the Star Formation Rate Density at 0.2 < z < 1.3",
  "authors": [
    "A. M Matthews",
    "D. D. Kelson",
    "A. B. Newman",
    "F. Camilo",
    "J. J. Condon",
    "W. D. Cotton",
    "M. Dickinson",
    "T. H. Jarrett",
    "M. Lacy"
  ],
  "comment": "11 pages, 4 figures, submitted to AAS journals",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present the initial sample of redshifts for 3,839 galaxies in the MeerKAT DEEP2 field -- the deepest $\\sim$1.4\\,GHz radio field yet observed. Using a spectrophotometric technique combining coarse optical spectra with broadband photometry, we obtain redshifts with $\\sigma_z \\leq 0.01(1+z)$. The resulting radio luminosity functions between $0.2<z<1.3$ from our sample of 3,839 individual galaxies are in remarkable agreement with those inferred from modeling radio source counts, confirming an excess in radio-based SFRD$(z$) measurements at late times compared to those from the UV--IR. Several sources of systematic error are discussed -- with most having the potential of exacerbating the discrepancy -- with the conclusion that significant work remains to have confidence in a full accounting of the star formation budget of the universe.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-10-26T18:00:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "star formation rate density",
      "uv-ir measures",
      "substantial discrepancy",
      "combining coarse optical spectra",
      "technique combining coarse optical"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}