Author dc.contributor.author | Bernardi, M | |
Author dc.contributor.author | Sheth, R K | |
Author dc.contributor.author | Annis, J | |
Author dc.contributor.author | Burles, S | |
Author dc.contributor.author | Finkbeiner, D P | |
Author dc.contributor.author | Lupton, R H | |
Author dc.contributor.author | Schlegel, D J | |
Author dc.contributor.author | Subbarao, M | |
Author dc.contributor.author | Bahcall, N A | |
Author dc.contributor.author | Blakeslee, J P | |
Author dc.contributor.author | Brinkmann, J | |
Author dc.contributor.author | Castander, F J | |
Author dc.contributor.author | Connolly, A J | |
Author dc.contributor.author | Csabai, I | |
Author dc.contributor.author | Doi, M | |
Author dc.contributor.author | Fukugita, M | |
Author dc.contributor.author | Frieman, J | |
Author dc.contributor.author | Heckman, T | |
Author dc.contributor.author | Hennessy, G S | |
Author dc.contributor.author | Ivezic, Z | |
Author dc.contributor.author | Knapp, G R | |
Author dc.contributor.author | Lamb, D Q | |
Author dc.contributor.author | Mckay, T | |
Author dc.contributor.author | Munn, J A | |
Author dc.contributor.author | Nichol, R | |
Author dc.contributor.author | Okamura, S | |
Author dc.contributor.author | Schneider, D P | |
Author dc.contributor.author | Thakar, A R | |
Author dc.contributor.author | York, D G | |
Availability Date dc.date.accessioned | 2020-08-08T20:16:43Z | |
Availability Date dc.date.available | 2020-08-08T20:16:43Z | |
Release dc.date.issued | 2003 | |
uri dc.identifier.uri | http://hdl.handle.net/10831/49221 | |
Abstract dc.description.abstract | The colors and chemical abundances of early-type galaxies at redshifts z < 0.3 are studied using a sample of nearly 9000 galaxies, selected from the Sloan Digital Sky Survey using morphological and spectral criteria. In this sample, redder galaxies have larger velocity dispersions: g*-r* proportional to sigma(0.26+/-0.02). Color also correlates with magnitude, g* - r* proportional to (-0.025+/-0.003) Mr(*), and size, but these correlations are entirely due to the L-sigma and R-o-sigma relations: the primary correlation is color-sigma. The red light in early-type galaxies is, on average, slightly more centrally concentrated than the blue. Because of these color gradients, the strength of the color-magnitude relation depends on whether or not the colors are defined using a fixed metric aperture; the color-sigma relation is less sensitive to this choice. Chemical evolution and star formation histories of early-type galaxies are investigated using co-added spectra of similar objects. The resulting library of co-added spectra contains spectra that represent a wide range of early-type galaxies. Chemical abundances correlate primarily with velocity dispersion: H beta proportional to sigma(-0.24+/-0.03), Mg-2 proportional to sigma(0.20+/-0.02), Mg b proportional to sigma(0.32+/-0.03), and [Fe] proportional to sigma(0.11+/-0.03). At fixed sigma, the population at z similar to 0.2 had weaker Mg-2 and stronger H beta absorption compared to the population at z similar to 0. It was also bluer. Comparison of these colors and line strengths and their evolution with single-burst stellar population models suggests a formation time of 9 Gyr ago, consistent with a fundamental plane analysis of this sample. Although the fundamental plane shows that galaxies in dense regions are slightly different from galaxies in less dense regions, the co-added spectra and color-magnitude relations show no statistically significant dependence on environment. | |
Language dc.language | Angol | |
Title dc.title | Early-type galaxies in the Sloan Digital Sky Survey. IV. Colors and chemical evolution | |
Type dc.type | folyóiratcikk | |
Date Change dc.date.updated | 2020-06-05T11:52:57Z | |
Scope dc.format.page | 1882-1896 | |
Doi ID dc.identifier.doi | 10.1086/367795 | |
Wos ID dc.identifier.wos | 000181713100019 | |
ID Scopus dc.identifier.scopus | 0042260828 | |
MTMT ID dc.identifier.mtmt | 1064355 | |
Issue Number dc.identifier.issue | 4 | |
abbreviated journal dc.identifier.jabbrev | ASTRON J | |
Journal dc.identifier.jtitle | ASTRONOMICAL JOURNAL | |
Volume Number dc.identifier.volume | 125 | |
Release Date dc.description.issuedate | 2003 | |
department of Author dc.contributor.institution | Komplex Rendszerek Fizikája Tanszék | |
Author institution dc.contributor.department | Komplex Rendszerek Fizikája Tanszék |
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Tudományos publikációk (TTK) [2934]