Mass-dependent Color Evolution of Field Galaxies Back to z~3 Over the Wide Range of Stellar Mass

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dc.creatorKajisawa, Masaru
dc.creatorYamada, Toru
dc.date2006-06-03
dc.date2006-06-22
dc.date.accessioned2026-07-07T10:39:11Z
dc.date.available2026-07-07T10:39:11Z
dc.descriptionWe use deep multi-band optical and near-infrared data for four general fields, GOODS-South, HDF North/South, and IRAC UDF in GOODS-North to investigate the evolution of the observed rest-frame U-V color of field galaxies as a function of the stellar mass. In these four fields, the U-V color distributions of the galaxies at each mass and redshift interval are very similar. At 0.3<z<2.7, we found that more massive galaxies always tend to have a redder U-V color. High- and low-mass galaxies exhibit quite different color evolutions. As seen in our previous study in HDF-N, the color distribution of low-mass (M_stellar < 3x10^9M_solar) galaxies becomes significantly bluer with an increase in the redshift. This evolution of the average color can be explained by a constant star formation rate model with z_form~4. On the other hand, the average color of high-mass galaxies (M_stellar > 3x10^10M_solar) evolves more strongly at a high redshift. Such mass-dependent color distribution and its evolution indicate that galaxies with a larger stellar mass appear to have shorter star-formation timescales, and on an average, they form the larger fraction of their stars in the earlier epoch.
dc.description7 pages, 3 color figures, accepted for publication in ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0606067
dc.identifierhttp://arxiv.org/abs/astro-ph/0606067
dc.identifierAstrophys.J.650:12-17,2006
dc.identifierdoi:10.1086/506428
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180937
dc.subjectAstrophysics
dc.titleMass-dependent Color Evolution of Field Galaxies Back to z~3 Over the Wide Range of Stellar Mass
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