J/ApJ/634/861 Old passively evolving galaxies at z=1 (Yamada+, 2005)
The number density of old passively evolving galaxies at z=1 in the
Subaru/XMM-Newton Deep Survey Field.
Yamada T., Kodama T., Akiyama M., Furusawa H., Iwata I., Kajisawa M.,
Iye M., Ouchi M., Sekiguchi K., Shimasaku K., Simpson C., Tanaka I.,
Yoshida M.
<Astrophys. J., 634, 861-878 (2005)>
=2005ApJ...634..861Y 2005ApJ...634..861Y
ADC_Keywords: Redshifts ; Galaxies, photometry ; Equivalent widths
Keywords: cosmology: observations - galaxies: evolution -
galaxies: high-redshift - galaxies: photometry -
large-scale structure of universe
Abstract:
We obtained the number counts and the rest-frame B-band luminosity
function of color-selected old passively evolving galaxies (OPEGs) at
z=1 with very high statistical accuracy using a large and homogeneous
sample of about 4000 such objects with z'<25 detected in an area of
1.03deg2 in the Subaru/XMM-Newton Deep Survey (SXDS) field. Our
selection criteria are defined on the i'-z' and R-z' color-magnitude
plane so that OPEGs at z=0.9-1.1 with formation redshift zf=2-10 are
properly sampled with minimum contamination by other populations. The
limiting magnitude corresponds to the luminosity of galaxies with M*+3
at z=0 (where M* is the characteristic absolute magnitude of the
Schechter galaxy luminosity function). We made pilot redshift
observations for 99 OPEG candidates with 19<z'<22 and found that at
least 78% (73 of 93) of the entire sample, or 95% (73 of 77) of those
whose redshifts were obtained, indeed lie between z=0.87 and 1.12, and
most of their spectra show a continuum break and strong Ca H and K
lines, indicating that these objects are indeed dominated by the old
stellar populations.
Description:
In 2003 October and November, the SXDS team conducted follow-up
spectroscopic observations of the optical/X-ray imaging surveys
using the Faint Object Camera and Spectrograph (FOCAS) of the
Subaru telescope.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table4.dat 45 77 Redshifts of z'<22 OPEGs (Old Passively Evolving
Galaxies, i.e. galaxies without star formation)
--------------------------------------------------------------------------------
See also:
II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2004)
II/261 : GOODS initial results (Giavalisco+, 2004)
J/MNRAS/421/3060 : Subaru/XMM Deep Field radio imaging. III. (Simpson+, 2012)
J/ApJS/176/301 : Subaru/XMM-Newton deep survey IV. (SXDS) (Ouchi+, 2008)
J/MNRAS/381/1369 : Redshifts in Subaru/XMM Deep Field (Geach+, 2007)
J/MNRAS/372/741 : SXDF 100µJy catalogue (Simpson+, 2006)
J/A+A/437/883 : K20 survey: spectroscopic catalogue (Mignoli+, 2005)
J/AJ/127/2455 : Gemini Deep Deep Survey (GDDS) (Abraham+, 2004)
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- SXDS Source name,
in Simbad
21- 25 F5.2 mag z'magb [19.86/21.98] z'-band best AB magnitude
27- 30 F4.2 mag i'-z' i'-z' color index
32- 35 F4.2 mag Rc-z' Rc-z' color index
37- 41 F5.3 --- z [0.869/1.393] Spectroscopic redshift
42 A1 --- u_z [:] : = uncertainty due to the less
prominent spectral features
44- 45 I2 0.1nm W(OII) Observed [OII](3727) equivalent width (Å)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 08-Aug-2006