Morphological Classification of Galaxies using Photometric Parameters: the Concentration index versus the Coarseness parameter

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dc.creatorYamauchi, Chisato
dc.creatorIchikawa, Shin-ichi
dc.creatorDoi, Mamoru
dc.creatorYasuda, Naoki
dc.creatorYagi, Masafumi
dc.creatorFukugita, Masataka
dc.creatorOkamura, Sadanori
dc.creatorNakamura, Osamu
dc.creatorSekiguchi, Maki
dc.creatorGoto, Tomotsugu
dc.date2005-07-04
dc.date2005-07-13
dc.date.accessioned2026-07-07T11:24:33Z
dc.date.available2026-07-07T11:24:33Z
dc.descriptionWe devise improved photometric parameters for the morphological classification of galaxies using a bright sample from the First Data Release of the Sloan Digital Sky Survey. In addition to using an elliptical aperture concentration index for classification, we introduce a new texture parameter, coarseness, which quantifies deviations from smooth galaxy isophotes. The elliptical aperture concentration index produces morphological classifications that are in appreciably better agreement with visual classifications than those based on circular apertures. With the addition of the coarseness parameter,the success rate of classifying galaxies into early and late types increases to \~88% with respect to the reference visual classification. A reasonably high success rate ~68% is also attained in classifying galaxies into three types, early-type galaxies (E+S0), early- (Sa+Sb) and late- (Sc+Sdm+Im) type spiral galaxies.
dc.description13 pages, 16 figures, accepted by the Astronomical Journal
dc.identifierhttps://arxiv.org/abs/astro-ph/0507060
dc.identifierhttp://arxiv.org/abs/astro-ph/0507060
dc.identifierAstron.J.130:1545-1557,2005
dc.identifierdoi:10.1086/444416
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195231
dc.subjectAstrophysics
dc.titleMorphological Classification of Galaxies using Photometric Parameters: the Concentration index versus the Coarseness parameter
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