J/ApJ/588/218ivo://CDS.VizieR/J/ApJ/588/218doi:10.26093/cds/vizier.15880218CDSAbraham R.G.van den Bergh S.Nair P.2006-01-11T20:21:24Z2006-01-11T21:21:17ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxiesphotometryvisible-astronomysloan-photometryredshiftedIn this paper we present a new statistic for quantifying galaxy morphology based on measurements of the Gini coefficient of galaxy light distributions. This statistic is easy to measure and is commonly used in econometrics to measure how wealth is distributed in human populations. When applied to galaxy images, the Gini coefficient provides a quantitative measure of the inequality with which a galaxy's light is distributed among its constituent pixels. We measure the Gini coefficient of local galaxies in the Early Data Release of the Sloan Digital Sky Survey and demonstrate that this quantity is closely correlated with measurements of central concentration, but with significant scatter.2003ApJ...588..218Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/588/218CatalogResearchIsServedByTAP VizieR generic servicerelated-tohttp://www.sdss.org : SDSS Home PageJ/AJ/125/1817 : SDSS Early-Type Galaxies Catalog (Bernardi+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/588/218https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/588/218http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/588/218https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/588/218https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/588/218http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/588/218GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/588/218/table1SDSS Early Data Release g*<16mag Sampleg*RatThe g* band axial ratio (b/a)floatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[AVN2003]Identification number (1)charzRedshiftdoubleMODDistance Modulus (2)floati*magIsophotal i* band magnitude (3)magfloati*ConCentral i* band concentrationfloati*GiniThe i* band Gini coefficientfloate_i*GiniThe 1{sigma} error in iGinifloati*SBMean i* band surface brightnessmag.arcsec**-2floati*RatThe i* band axial ratio (b/a)floati*zpThe i* band zero pointmagfloatg*magIsophotal g* band magnitude (4)magfloatg*ConCentral g* band concentrationfloatg*GiniThe g* band Gini coefficientfloate_g*GiniThe 1{sigma} error in gGinifloatg*SBMean g* band surface brightnessmag.arcsec**-2floatg*zpThe g* band zero pointmagfloat