paper

The Evolution of the Fractions of Quiescent and Star-forming Galaxies as a Function of Stellar Mass Since z=3: Increasing Importance of Massive, Dusty Star-forming Galaxies in the Early Universe

arXiv:1606.04090 · doi:10.3847/2041-8205/827/2/L25

Abstract

Using the UltraVISTA DR1 and 3D-HST catalogs, we construct a stellar-mass-complete sample, unique for its combination of surveyed volume and depth, to study the evolution of the fractions of quiescent galaxies, moderately unobscured star-forming galaxies, and dusty star-forming galaxies as a function of stellar mass over the redshift interval . We show that the role of dusty star-forming galaxies within the overall galaxy population becomes more important with increasing stellar mass, and grows rapidly with increasing redshift. Specifically, dusty star-forming galaxies dominate the galaxy population with at . The ratio of dusty and non-dusty star-forming galaxies as a function of stellar mass changes little with redshift. Dusty star-forming galaxies dominate the star-forming population at , being a factor of 3-5 more common, while unobscured star-forming galaxies dominate at . At , red galaxies dominate the galaxy population at all redshift , either because they are quiescent (at late times) or dusty star-forming (in the early universe).

7 pages, 4 figures, 1 table. Accepted by Astrophysical Journal Letters after minor revision

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