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We use deep multi-band optical and near-infrared data for four generalfields, GOODS-South, HDF North/South, and IRAC UDF in GOODS-North toinvestigate the evolution of the observed rest-frame U-V color of fieldgalaxies as a function of the stellar mass. In these four fields, the U-V colordistributions of the galaxies at each mass and redshift interval are verysimilar. At 0.3<z<2.7, we found that more massive galaxies always tend to havea redder U-V color. High- and low-mass galaxies exhibit quite different colorevolutions. As seen in our previous study in HDF-N, the color distribution oflow-mass (M_stellar < 3x10^9M_solar) galaxies becomes significantly bluer withan increase in the redshift. This evolution of the average color can beexplained by a constant star formation rate model with z_form~4. On the otherhand, the average color of high-mass galaxies (M_stellar > 3x10^10M_solar)evolves more strongly at a high redshift. Such mass-dependent colordistribution and its evolution indicate that galaxies with a larger stellarmass appear to have shorter star-formation timescales, and on an average, theyform the larger fraction of their stars in the earlier epoch.Comment: 7 pages, 3 color figures, accepted for publication in Ap

Mass‐dependent Color Evolution of Field Galaxies back toz ∼ 3 over the Wide Range of Stellar Mass