J/MNRAS/427/1666 Massive galaxies in CANDELS-UDS field (Bruce+, 2012)
The morphologies of massive galaxies at 1 < z < 3 in the CANDELS-UDS field:
compact bulges, and the rise and fall of massive discs.
Bruce V.A., Dunlop J.S., Cirasuolo M., McLure R.J., Targett T.A.,
Bell E.F., Croton D.J., Dekel A., Faber S.M., Ferguson H.C., Grogin N.A.,
Kocevski D.D., Koekemoer A.M., Koo D.C., Lai K., Lotz J.M., McGrath E.J.,
Newman J.A., van der Wel A.
<Mon. Not. R. Astron. Soc., 427, 1666-1701 (2012)>
=2012MNRAS.427.1666B 2012MNRAS.427.1666B
ADC_Keywords: Galaxy catalogs ; Morphology
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
H160-band images of the ≃200 galaxies in the CANDELS-UDS field with
photometric redshifts 1<z<3, and stellar masses M*>1011M☉.
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.
Description:
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 2011ApJS..197...35G; Koekemoer et
al. 2011ApJS..197...36K 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).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables1.dat 113 215 Physical properties and best-fitting parameters
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See also:
II/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)
J/ApJS/176/301 : Subaru/XMM-Newton deep survey IV. (SXDS) (Ouchi+, 2008)
Byte-by-byte Description of file: tables1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID [100222/123457] Galaxy identification number
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 18 F5.2 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 30 F4.1 arcsec DEs Declination (J2000)
32- 35 F4.2 10+11Msun M* Stellar mass (1)
37- 40 F4.2 --- zph [1/3] Photometric redshift (2)
42- 46 F5.2 mag Hmag HST/WFC3 IR H160 total magnitude (3)
48- 51 F4.1 --- n [0/20] Single Sersic index (4)
53- 56 F4.1 kpc re Single Sersic effective radius (4)
58- 61 F4.2 --- b/a [0/1] Single Sersic axial ratio (4)
63- 66 F4.2 --- PSFn [0/1] Single Sersic PSF fraction (4)
68 I1 --- F [0/1] unacceptable single component model (4)
70- 72 F3.1 --- Mod [0/4] Model type (0.0, 1.0 or 4.0;
not explained in the paper)
74- 77 F4.1 kpc reB ?=- Bulge effective radius
79- 82 F4.2 --- b/aB ?=- Bulge axial ratio
84- 87 F4.1 kpc reD ?=- Disc effective radius
89- 92 F4.2 --- b/aD [0/1]? Disc axial ratio
94- 97 F4.2 --- Bulge [0/1] Bulge fraction
99-102 F4.2 --- Disc [0/1] Disc fraction
104-107 F4.2 --- PSF [0/1] PSF fraction
109 I1 --- F0 [0/1] Flag original
111 I1 --- F1 [0/1] Flag first refinement
113 I1 --- F2 [0/1] Flag final refinement
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Note (1): Errors on photometric redshifts are of the order of
δz/(1+zsp)=0.05, from Cirasuolo et al. (in preparation).
Note (2): We quote errors on our stellar mass estimates of a factor of 2
(Michalowski et al., 2012A&A...541A..85M 2012A&A...541A..85M), where these are driven by
uncertainties in the photometry from the IRAC bands and from photometric
redshifts.
Note (3): We estimate errors on our total magnitudes of order ±0.05mag, as
our sample of galaxies are at the extreme bright end (>10σ) so their
errors are limited to uncertainties in photometric zero-points.
Note (4): Obtaining individual uncertainties for all the parameters of
multiple-component fits listed here is impractical as the degree of
systematic and correlated errors varies on an object-by-object basis.
However, from the detailed parameter space search conducted for our
single-Sersic models, we determined errors of the order of 10% for
effective radii and 5% for Sersic indices, with errors being somewhat
smaller for better constrained parameters such as axial ratios.
Therefore, we estimate that the multiple-component errors will be a
factor of sqrt(2) larger, giving errors on fitted parameters up to
15%. However, we note that in the case of weak secondary components
the errors can potentially be much larger, but as our science plots
use only parameters from significant components the errors should be
similar to those of the single component models.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 09-Aug-2013