Properties of disks and bulges of spiral and lenticular galaxies in the Sloan Digital Sky Survey

N. Oohama, S. Okamura, M. Fukugita, N. Yasuda, Osamu Nakamura

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    A bulge-disk decomposition is made for 737 spiral and lenticular galaxies drawn from a Sloan Digital Sky Survey galaxy sample for which morphological types are estimated. We carry out the bulge-disk decomposition using the growth curve fitting method. It is found that bulge properties, effective radius, effective surface brightness, and also absolute magnitude, change systematically with the morphological sequence; from early to late types, the size becomes somewhat larger, and surface brightness and luminosity fainter. In contrast, disks are nearly universal, their properties remaining similar among disk galaxies irrespective of detailed morphologies from S0 to Sc. While these tendencies were often discussed in previous studies, the present study confirms them based on a large homogeneous magnitude-limited field galaxy sample with morphological types estimated. The systematic change of bulge-to-total luminosity ratio, B/T, along the morphological sequence is therefore not caused by disks but mostly by bulges. It is also shown that elliptical galaxies and bulges of spiral galaxies are unlikely to be in a single sequence. We infer the stellar mass density (in units of the critical mass density) to be Ω = 0.0021 for spheroids, i.e., elliptical galaxies plus bulges of spiral galaxies, and Ω = 0.00081 for disks.

    Original languageEnglish
    Pages (from-to)245-705
    Number of pages461
    JournalAstrophysical Journal
    Volume705
    Issue number1
    DOIs
    Publication statusPublished - 2009 Nov 1

    Fingerprint

    spiral galaxies
    decomposition
    galaxies
    growth curve
    elliptical galaxies
    brightness
    luminosity
    critical mass
    disk galaxies
    spheroids
    curve fitting
    stellar mass
    tendencies
    radii
    method

    Keywords

    • Galaxies: evolution
    • Galaxies: formation
    • Galaxies: fundamental parameters

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Properties of disks and bulges of spiral and lenticular galaxies in the Sloan Digital Sky Survey. / Oohama, N.; Okamura, S.; Fukugita, M.; Yasuda, N.; Nakamura, Osamu.

    In: Astrophysical Journal, Vol. 705, No. 1, 01.11.2009, p. 245-705.

    Research output: Contribution to journalArticle

    Oohama, N. ; Okamura, S. ; Fukugita, M. ; Yasuda, N. ; Nakamura, Osamu. / Properties of disks and bulges of spiral and lenticular galaxies in the Sloan Digital Sky Survey. In: Astrophysical Journal. 2009 ; Vol. 705, No. 1. pp. 245-705.
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