The morphologies of massive galaxies at 1 < z < 3 in the CANDELS-UDS field compact bulges, and the rise and fall of massive discs. (2012)
Keywords :
galaxies elliptical and lenticular, cD - galaxies: evolution - galaxies: high-redshift - galaxies: spiral - galaxies: structure
Abstract:We have used high-resolution, Hubble Space Telescope, near-infrared imaging to conduct a detailed analysis of the morphological properties of the most massive galaxies at high redshift, modelling the WFC3/IR H_160_-band images of the =~200 galaxies in the CANDELS-UDS field with photometric redshifts 1<z<3, and stellar masses M_*_>10^11^M_{sun}_. We have explored the results of fitting single-Sersic and bulge+disc models, and have investigated the additional errors and potential biases introduced by uncertainties in the background and the on-image point spread function.
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The main aim of this paper is to present a comprehensive and robust
analysis of the morphological properties of a significant sample of
the most massive galaxies in the redshift range 1<z<3. In order to
achieve this we have focused our study on the UKIDSS Ultra Deep Survey
(UDS; Lawrence et al. 2007, Cat. II/314), the central region of which
has been imaged with HST WFC3/IR as part of the CANDELS multicycle
treasury programme (Grogin et al. 2011ApJS..197...35G; Koekemoer et
al. 2011ApJS..197...36K).
In addition to the near-infrared imaging provided by HST, the data
sets we make use of for sample selection (i.e. photometric redshifts,
stellar mass determination, SFRs and star formation histories)
include: deep optical imaging in the B-, V-, R-, i'- and z'-band
filters from the Subaru XMM-Newton Deep Survey (SXDS; Sekiguchi et
al. 2005, in Renzini A., Bender R., eds, Multiwavelength Mapping of
Galaxy Formation and Evolution. Springer, Berlin, p. 82; Furusawa et
al. 2008, Cat. J/ApJS/176/301); U-band imaging obtained with MegaCam
on Canada-France-Hawaii Telescope; J-, H- and K-band United
Kingdom Infrared Telescope (UKIRT) WFCAM imaging from Data Release 8
(DR8) of the UKIDSS UDS; and Spitzer 3.6-, 4.5-, 5.8- and 8.0-um IRAC
and 24-um MIPS imaging from the SpUDS legacy programme (PI Dunlop).
- II/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)
- J/ApJS/176/301 : Subaru/XMM-Newton deep survey IV. (SXDS) (Ouchi+, 2008)
