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The Morphologies of Massive Galaxies at 1<z<3 in the CANDELS-UDS Field: Compact Bulges, and the Rise and Fall of Massive Disks

Published online by Cambridge University Press:  17 July 2013

V. A. Bruce ,
J. S. Dunlop ,
M. Cirasuolo ,
R. J. McLure ,
T. A. Targett ,
E. F. Bell ,
D. J. Croton ,
A. Dekel ,
S. M. Faber  and
H. C. Ferguson
...Show all authors
V. A. Bruce*
Affiliation:
SUPA‡Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
J. S. Dunlop
Affiliation:
SUPA‡Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
M. Cirasuolo
Affiliation:
SUPA‡Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ UK Astronomy Technology Centre, Science and Technology Facilities Council, Royal Observatory, Edinburgh EH9 3HJ
R. J. McLure
Affiliation:
SUPA‡Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
T. A. Targett
Affiliation:
SUPA‡Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
E. F. Bell
Affiliation:
Department of Astronomy, University of Michigan, 500 Church St., Ann Arbor, MI 48109, USA
D. J. Croton
Affiliation:
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
A. Dekel
Affiliation:
Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel
S. M. Faber
Affiliation:
UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA
H. C. Ferguson
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
N. A. Grogin
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
D. D. Kocevski
Affiliation:
UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA
A. M. Koekemoer
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
D. C. Koo
Affiliation:
UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA
K. Lai
Affiliation:
UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA
J. M. Lotz
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
E. J. McGrath
Affiliation:
UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA
J. A. Newman
Affiliation:
University of Pittsburgh, Pittsburgh, PA 15260, USA
A. van der Wel
Affiliation:
Max-Planck Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
*
†E-mail: vab@roe.ac.uk
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Abstract

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We have used high-resolution, HST WFC3/IR, near-infrared imaging to conduct a detailed bulge-disk decomposition of the morphologies of ≃ 200 of the most massive (M* > 1011 M⊙) galaxies at 1 < z < 3 in the CANDELS-UDS field. We find that, while such massive galaxies at low redshift are generally bulge-dominated, at redshifts 1<z<2 they are predominantly mixed bulge+disk systems, and by z > 2 they are mostly disk-dominated. Interestingly, we find that while most of the quiescent galaxies are bulge-dominated, a significant fraction (25–40%) of the most quiescent galaxies, have disk-dominated morphologies. Thus, our results suggest that the physical mechanisms which quench star-formation activity are not simply connected to those responsible for the morphological transformation of massive galaxies.

Keywords

galaxies: elliptical and lenticularcDgalaxies: evolutiongalaxies: high-redshiftgalaxies: structure

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