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arXiv · 1404.2844

3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$

A. van der Wel·M. Franx·P. G. van Dokkum·R. E. Skelton·I. G. Momcheva·K. E. Whitaker·G. B. Brammer·E. F. Bell·H. -W. Rix·S. Wuyts·H. C. Ferguson·B. P. Holden·G. Barro·A. M. Koekemoer·Yu-Yen Chang·E. J. McGrath·B. Haussler·A. Dekel·P. Behroozi·M. Fumagalli·J. Leja·B. F. Lundgren·M. V. Maseda·E. J. Nelson·D. A. Wake·S. G. Patel·I. Labbe·S. M. Faber·N. A. Grogin·D. D. Kocevski
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Abstract

Spectroscopic + photometric redshifts, stellar mass estimates, and rest-frame colors from the 3D-HST survey are combined with structural parameter measurements from CANDELS imaging to determine the galaxy size-mass distribution over the redshift range 0 3x10^9 M_sol, and steep, R_eff M_star^0.75, for early-type galaxies with stellar mass >2x10^10 M_sol. The intrinsic scatter is <~0.2 dex for all galaxy types and redshifts. For late-type galaxies, the logarithmic size distribution is not symmetric, but skewed toward small sizes: at all redshifts and masses a tail of small late-type galaxies exists that overlaps in size with the early-type galaxy population. The number density of massive (~10^11 M_sol), compact (R_eff < 2 kpc) early-type galaxies increases from z=3 to z=1.5-2 and then strongly decreases at later cosmic times.

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A. van der Wel, M. Franx, P. G. van Dokkum, R. E. Skelton, I. G. Momcheva, K. E. Whitaker, G. B. Brammer, E. F. Bell, H. -W. Rix, S. Wuyts, H. C. Ferguson, B. P. Holden, G. Barro, A. M. Koekemoer, Yu-Yen Chang, E. J. McGrath, B. Haussler, A. Dekel, P. Behroozi, M. Fumagalli, J. Leja, B. F. Lundgren, M. V. Maseda, E. J. Nelson, D. A. Wake, S. G. Patel, I. Labbe, S. M. Faber, N. A. Grogin, D. D. Kocevski. 2014-04-10. 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$. https://doi.org/10.1088/0004-637x/788/1/28

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