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, Eric F. Bell, H-W. Rix, Stijn 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. FumagalliJ. Leja, B.F. Lundgren, M.V. Maseda, E.J. Nelson, D.A. Wake, S.G. Patel, I. Labbe, Sandra 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 < z < 3. Separating early- and late-type galaxies on the basis of star-formation activity, we confirm that early-type galaxies are on average smaller than late-type galaxies at all redshifts, and we find a significantly different rate of average size evolution at fixed galaxy mass, with fast evolution for the early-type population, R eff∝(1 + z)–1.48, and moderate evolution for the late-type population, R eff∝(1 + z)-0.75
    Original languageEnglish
    Article number28
    Number of pages19
    JournalThe Astrophysical Journal
    Volume788
    Issue number1
    Early online date19 May 2014
    DOIs
    Publication statusPublished - 10 Jun 2014

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