{
  "id": "1512.03072",
  "version": "v1",
  "published": "2015-12-09T21:01:21.000Z",
  "updated": "2015-12-09T21:01:21.000Z",
  "title": "Red galaxies with pseudo-bulges in the SDSS: closer to disk galaxies or to classical bulges?",
  "authors": [
    "B. Ribeiro",
    "C. Lobo",
    "S. Antón",
    "J. M. Gomes",
    "P. Papaderos"
  ],
  "comment": "18 pages, 12 figure, accepted for MNRAS",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "Pseudo-bulges are expected to markedly differ from classical, quasi-monolithically forming bulges in their star formation history (SFH) and chemical abundance patterns. To test this simple expectation, we carry out a comparative structural and spectral synthesis analysis of 106 red, massive galaxies issued from the SDSS, subdivided into bulgeless, pseudo-bulge and classical bulge galaxies according to their photometric characteristics, and further obeying a specific selection to minimize uncertainties in the analysis and ensure an unbiased derivation and comparison of SFHs. Our 2D photometry analysis suggests that disks underlying pseudo-bulges typically have larger exponential scale lengths than bulgeless galaxies, despite similar integral disk luminosities. Spectral synthesis models of the stellar emission within the 3\" SDSS fiber aperture reveal a clear segregation of bulgeless and pseudo-bulge galaxies from classical bulges on the luminosity-weighted planes of age-metallicity and mass-metallicity, though a large dispersion is observed within the two former classes. The secular growth of pseudo-bulges is also reflected upon their cumulative stellar mass as a function of time, which is shallower than that for classical bulges. Such results suggest that the centers of bulgeless and pseudo-bulge galaxies substantially differ from those of bulgy galaxies with respect to their SFH and chemical enrichment history, which likely points to different formation/assembly mechanisms.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-12-09T21:01:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "classical bulge",
      "disk galaxies",
      "red galaxies",
      "despite similar integral disk luminosities",
      "spectral synthesis"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 18,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}