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Author
dc.contributor.author
Strateva, I 
Author
dc.contributor.author
Ivezic, Z 
Author
dc.contributor.author
Knapp, G R 
Author
dc.contributor.author
Narayanan, V K 
Author
dc.contributor.author
Strauss, M A 
Author
dc.contributor.author
Gunn, J E 
Author
dc.contributor.author
Lupton, R H 
Author
dc.contributor.author
Schlegel, D 
Author
dc.contributor.author
Bahcall, N A 
Author
dc.contributor.author
Brinkmann, J 
Availability Date
dc.date.accessioned
2020-08-08T20:01:41Z
Availability Date
dc.date.available
2020-08-08T20:01:41Z
Release
dc.date.issued
2001
uri
dc.identifier.uri
http://hdl.handle.net/10831/49188
Abstract
dc.description.abstract
We study the optical colors of 147,920 galaxies brighter than g* = 21, observed in five bands by the Sloan Digital Sky Survey (SDSS) over similar to 100 deg(2) of high Galactic latitude sky along the celestial equator. The distribution of galaxies in the g*-r* versus u*-g* color-color diagram is strongly bimodal, with an optimal color separator of u*-r* = 2.22. We use visual morphology and spectral classification of subsamples of 287 and 500 galaxies, respectively, to show that the two peaks correspond roughly to early- (E, S0, and Sa) and late-type (Sb, Sc, and Irr) galaxies, as expected from their different stellar populations. We also find that the colors of galaxies are correlated with their radial profiles, as measured by the concentration index and by the likelihoods of exponential and de Vaucouleurs' profile fits. While it is well known that late-type galaxies are bluer than early-type galaxies, this is the first detection of a local minimum in their color distribution. In all SDSS bands, the counts versus apparent magnitude relations for the two color types are significantly different and demonstrate that the fraction of blue galaxies increases toward the faint end.
Language
dc.language
Angol
Title
dc.title
Color separation of galaxy types in the Sloan Digital Sky Survey imaging data
Type
dc.type
folyóiratcikk
Date Change
dc.date.updated
2020-06-05T10:54:07Z
Scope
dc.format.page
1861-1874
Doi ID
dc.identifier.doi
10.1086/323301
Wos ID
dc.identifier.wos
000171420700017
ID Scopus
dc.identifier.scopus
18044362115
MTMT ID
dc.identifier.mtmt
1064393
Issue Number
dc.identifier.issue
4
abbreviated journal
dc.identifier.jabbrev
ASTRON J
Journal
dc.identifier.jtitle
ASTRONOMICAL JOURNAL
Volume Number
dc.identifier.volume
122
Release Date
dc.description.issuedate
2001
department of Author
dc.contributor.institution
Alba Regia Egyetemi Központ
department of Author
dc.contributor.institution
Mérnöki Intézet
department of Author
dc.contributor.institution
Komplex Rendszerek Fizikája Tanszék
Author institution
dc.contributor.department
Komplex Rendszerek Fizikája Tanszék


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Color separation of galaxy types in the Sloan Digital Sky Survey imaging data
 

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