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

Astronomy and Astrophysics – Astrophysics

Scientific paper

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7 pages, 3 color figures, accepted for publication in ApJ

Scientific paper

10.1086/506428

We 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 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.

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