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arXiv · 1009.0002

MOIRCS Deep Survey. VIII. Evolution of Star Formation Activity as a Function of Stellar Mass in Galaxies since z~3

M. Kajisawa·T. Ichikawa·T. Yamada·Y. K. Uchimoto·T. Yoshikawa·M. Akiyama·M. Onodera
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Abstract

We study the evolution of star formation activity of galaxies at 0.5 ~1. We found galaxies at 2.5 1 and becomes significant at z~3, especially in the case with the SFR based on MIPS 24um. In galaxies with Mstar = 10^{10-11.5} Msun, those with a relatively narrow range of SSFR (<~1 dex) dominates the cosmic SFRD at 0.5<z<3.5. The SSFR of galaxies which dominate the SFRD systematically increases with redshift. At 2.5<z<3.5, the high-SSFR population, which is relatively small in number, dominates the SFRD. Major star formation in the universe at higher redshift seems to be associated with a more rapid growth of stellar mass of galaxies.

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M. Kajisawa, T. Ichikawa, T. Yamada, Y. K. Uchimoto, T. Yoshikawa, M. Akiyama, M. Onodera. 2010-08-31. MOIRCS Deep Survey. VIII. Evolution of Star Formation Activity as a Function of Stellar Mass in Galaxies since z~3. https://doi.org/10.1088/0004-637x/723/1/129

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