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Cited by 1,599

The DOI matches its Crossref record; 20 of the 20 references it cites were found in a registry or an index.

Color Separation of Galaxy Types in the Sloan Digital Sky Survey Imaging Data

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Strateva, Iskra, Ivezić, Željko, Knapp, Gillian R., Narayanan, Vijay K., Strauss, Michael A., Gunn, James E., Lupton, Robert H., Schlegel, David, Bahcall, Neta A., Brinkmann, Jon, Brunner, Robert J., Budavári, Tamás, Csabai, István, Castander, Francisco Javier, Doi, Mamoru, Fukugita, Masataka, Győry, Zsuzsanna, Hamabe, Masaru, Hennessy, Greg, Ichikawa, Takashi, Kunszt, Peter Z., Lamb, Don Q., McKay, Timothy A., Okamura, Sadanori, Racusin, Judith, Sekiguchi, Maki, Schneider, Donald P., Shimasaku, Kazuhiro, York, Donald·2001·The Astronomical Journal
DOI 10.1086/323301
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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 ∼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.

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Metadata

Authors
Strateva, I., Ivezić, Ž., Knapp, G. R., Narayanan, V. K., Strauss, M. A., Gunn, J. E., Lupton, R. H., Schlegel, D., Bahcall, N. A., Brinkmann, J., Brunner, R. J., Budavári, T., Csabai, I., Castander, F. J., Doi, M., Fukugita, M., Győry, Z., Hamabe, M., Hennessy, G., Ichikawa, T., Kunszt, P. Z., Lamb, D. Q., McKay, T. A., Okamura, S., Racusin, J., Sekiguchi, M., Schneider, D. P., Shimasaku, K., & York, D.
Venue
The Astronomical Journal
Publisher
American Astronomical Society
Published
2001-10
Volume
122
Issue
4
Pages
1861-1874
ISSN
0004-6256 (ISSN-L)
DOI
10.1086/323301
OpenAlex
W2104403548
Cited by
1,599
References
20
FWCI
15.07
Type
journal article
Language
en
Open access
bronze

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