J/AJ/132/1023 U-band dropouts in Hubble Ultra Deep Field (Wadadekar+, 2006)
Faint u-band dropouts in the WFPC2 parallels of the Hubble Ultra Deep Field.
Wadadekar Y., Casertano S., De Mello D.
<Astron. J., 132, 1023-1034 (2006)>
=2006AJ....132.1023W 2006AJ....132.1023W
ADC_Keywords: Surveys ; Galaxies, photometry ; Ultraviolet
Keywords: cosmology: observations - galaxies: distances and redshifts -
galaxies: evolution - galaxies: statistics - ultraviolet: galaxies
Abstract:
We combine data from the extremely deep Hubble Space Telescope
U (F300W) image, obtained using WFPC2 as part of the parallel
observations of the Hubble Ultra Deep Field campaign, with BVi images
from the Great Observatories Origins Deep Survey to identify a sample
of Lyman break galaxies in the redshift range 2.0≤z≤3.5. We use
recent stellar population synthesis models with a wide variety of
ages, metallicities, redshifts, and dust content, and a detailed
representation of the HI cosmic opacity as a function of redshift
to model the colors of galaxies in our combination of WFPC2 and ACS
filters. Using these models, we derive improved color selection
criteria that provide a clean selection of relatively unobscured
star-forming galaxies in this redshift range. Our WFPC2 F300W image
is the deepest image ever obtained at that wavelength. The 10 limiting
magnitude measured over 0.2arcsec2 is 27.5mag in the WFPC2 F300W
image, about 0.5mag deeper than the F300W image in the Hubble Deep
Field (HDF)-North.
Description:
In this paper we analyze the HUDF WFPC2 (F300W) parallels that overlap
substantially over the GOODS-S area, i.e., the epoch1-orient 310/314
image (see Fig. 1 of de Mello et al. (2006AJ....131..216D 2006AJ....131..216D) for a
finding chart of this area relative to the GOODS-S field). The other
WFPC2 parallel field (epoch 2-orient 40/44) overlaps with the Galaxy
Evolution from Morphology and SEDs (Rix et al., 2004ApJS..152..163R 2004ApJS..152..163R)
survey area; because of the lack of B-band data this region cannot be
studied in the same way and is not considered further in this paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 99 125 U band dropouts
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See also:
J/ApJ/653/53 : z∼6 galaxies UV luminosity function (Bouwens+, 2006)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 F9.6 deg RAdeg Right Ascension in decimal degrees (J2000)
11- 20 F10.6 deg DEdeg Declination in decimal degrees (J2000)
22 A1 --- l_Umag Limit flag on Umag
23- 27 F5.2 mag Umag The WFPC2/F300W band magnitude (1)
29- 33 F5.2 mag Bmag The ACS/F435W band magnitude (1)
35- 39 F5.2 mag Vmag The ACS/F606W band magnitude (1)
41- 45 F5.2 mag imag The ACS/F775W band magnitude (1)
47 I1 --- Class [1/6] Class (2)
49- 99 A51 --- Comm Additional comments
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Note (1): The magnitudes listed are in the AB system.
Note (2): Class as follows:
1 = single and compact (clump)
2 = double or multiple clumps (chain)
3 = a clump with a tail (tadpole)
4 = not compact but extended and fuzzy
5 = fuzzy extended and with a more organized disk-like structure
6 = not classified, very faint
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 25-Sep-2008