{
  "id": "1805.03609",
  "version": "v1",
  "published": "2018-05-09T16:29:35.000Z",
  "updated": "2018-05-09T16:29:35.000Z",
  "title": "The ALHAMBRA survey: tight dependence of the optical mass-to-light ratio on galaxy colour up to z = 1.5",
  "authors": [
    "C. López-Sanjuan",
    "L. A. Díaz-García",
    "A. J. Cenarro",
    "A. Fernández-Soto",
    "K. Viironen",
    "A. Molino",
    "N. Benítez",
    "D. Cristóbal-Hornillos",
    "M. Moles",
    "J. Varela",
    "P. Arnalte-Mur",
    "B. Ascaso",
    "F. J. Castander",
    "M. Cerviño",
    "R. M. González Delgado",
    "C. Husillos",
    "I. Márquez",
    "J. Masegosa",
    "A. Del Olmo",
    "M. Pović",
    "J. Perea"
  ],
  "comment": "Submitted to Astronomy and Astrophysics. 9 pages, 6 figures, 1 table. Comments are welcome",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "Our goal is to characterise the dependence of the optical mass-to-light ratio on galaxy colour up to z = 1.5, expanding the redshift range explored in previous work. From the ALHAMBRA redshifts, stellar masses, and rest-frame luminosities provided by the MUFFIT code, we derive the mass-to-light ratio vs. colour relation (MLCR) both for quiescent and star-forming galaxies. The intrinsic relation and its physical dispersion are derived with a Bayesian inference model. The rest-frame i-band mass-to-light ratio of quiescent and star-forming galaxies presents a tight correlation with the rest-frame (g - i) colour up to z = 1.5. Such MLCR is linear for quiescent galaxies and quadratic for star-forming galaxies. The intrinsic dispersion in these relations is 0.02 dex for quiescent galaxies and 0.06 dex for star-forming ones. The derived MLCRs do not present a significant redshift evolution and are compatible with previous local results in the literature. Finally, these tight relations also hold for g- and r-band luminosities. The derived MLCRs in ALHAMBRA can be used to predict the mass-to-light ratio from a rest-frame optical colour up to z = 1.5. These tight correlations do not change with redshift, suggesting that galaxies have evolved along the derived relations during the last 9 Gyr.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-05-09T16:29:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "optical mass-to-light ratio",
      "galaxy colour",
      "tight dependence",
      "alhambra survey",
      "star-forming galaxies"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}