{
  "id": "2109.11564",
  "version": "v1",
  "published": "2021-09-23T18:00:03.000Z",
  "updated": "2021-09-23T18:00:03.000Z",
  "title": "SDSS-IV MaNGA: drivers of stellar metallicity in nearby galaxies",
  "authors": [
    "Justus Neumann",
    "Daniel Thomas",
    "Claudia Maraston",
    "Daniel Goddard",
    "Jianhui Lian",
    "Lewis Hill",
    "Helena Domínguez Sánchez",
    "Mariangela Bernardi",
    "Berta Margalef-Bentabol",
    "Jorge K. Barrera-Ballesteros",
    "Dmitry Bizyaev",
    "Nicholas F. Boardman",
    "Niv Drory",
    "Joseé G. Fernández-Trincado",
    "Richard Lane"
  ],
  "comment": "16 pages, 11 figures. MNRAS accepted, pending a few minor revisions",
  "doi": "10.1093/mnras/stab2868",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "The distribution of stellar metallicities within and across galaxies is an excellent relic of the chemical evolution across cosmic time. We present a detailed analysis of spatially resolved stellar populations based on $>2.6$ million spatial bins from 7439 nearby galaxies in the SDSS-IV MaNGA survey. To account for accurate inclination corrections, we derive an equation for morphology dependent determination of galaxy inclinations. Our study goes beyond the well-known global mass-metallicity relation and radial metallicity gradients by providing a statistically sound exploration of local relations between stellar metallicity $[Z/H]$, stellar surface mass density $\\Sigma_\\star$ and galactocentric distance in the global mass-morphology plane. We find a significant resolved mass density-metallicity relation $\\rm r\\Sigma_\\star ZR$ for galaxies of all types and masses above $10^{9.8}\\,\\mathrm{M_\\odot}$. Different radial distances make an important contribution to the spread of the relation. Particularly, in low and intermediate mass galaxies, we find that at fixed $\\Sigma_\\star$ metallicity increases with radius independently of morphology. For high masses, this radial dependence is only observed in high $\\Sigma_\\star$ regions of spiral galaxies. This result calls for a driver of metallicity, in addition to $\\Sigma_\\star$ that promotes chemical enrichment in the outer parts of galaxies more strongly than in the inner parts. We discuss gas accretion, outflows, recycling and radial migration as possible scenarios.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-09-23T18:00:03.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "stellar metallicity",
      "sdss-iv manga",
      "nearby galaxies",
      "well-known global mass-metallicity relation",
      "stellar surface mass density"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}