J/ApJ/643/680 Imaging and spectroscopy around PKS 0405-123 (Prochaska+, 2006)
Probing the intergalactic medium-galaxy connection toward PKS 0405-123.
III. The galaxy survey and correlations with O VI absorbers.
Prochaska J.X., Weiner B.J., Chen H.-W., Mulchaey J.S.
<Astrophys. J., 643, 680-691 (2006)>
=2006ApJ...643..680P 2006ApJ...643..680P
ADC_Keywords: QSOs ; Photometry ; Galaxies, spectra
Keywords: quasars: absorption lines
Abstract:
We present a galaxy survey of the field surrounding PKS 0405-123
performed with the WFCCD spectrometer at Las Campanas Observatory. The
survey is comprised of two data sets: (1) a greater than 95% complete
survey to R=20mag of the field centered on PKS 0405-123 with
10' radius (L∼0.1L* and radius of 1Mpc at z=0.1); and (2) a set of
four discontiguous (i.e., non-overlapping), flanking fields covering
∼1deg2 area with completeness ∼90% to R=19.5mag. With these data
sets, one can examine the local and large-scale galactic environment
of the absorption systems identified toward PKS 0405-123. In this
paper, we focus on the O VI systems analyzed in Paper I (Prochaska et
al., 2004, Cat. J/ApJ/617/718). The results suggest that this gas
arises in a diverse set of galactic environments including the halos
of individual galaxies, galaxy groups, filamentary-like structures,
and also regions devoid of luminous galaxies. In this small sample,
there are no obvious trends between galactic environment and the
physical properties of the gas. Furthermore, we find similar results
for a set of absorption systems with comparable NHI but no detectable
metal lines. The observations indicate that metals are distributed
throughout a wide range of environments in the local universe. Future
papers in this series will address the distribution of galactic
environments associated with metal-line systems and the Ly forest
based on data for over 10 additional fields. All of the spectra and
fits tables are available at http://www.ucolick.org/~xavier/WFCCDOVI/
Description:
To perform target selection for multislit spectroscopy, we imaged the
field surrounding PKS 0405-123 with the Swope 40 inch (1m) telescope
at Las Campanas Observatory. Our first set of images were acquired on
UT 2000 October 26. We obtained B and R images under photometric
(but windy) conditions for total exposure times of 900 and 350s,
respectively. We acquired additional R images of the field on the
photometric nights of UT 2002 October 3 and 4.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
04 07 48.4 -12 11 37 PKS 0405-123 = QSO J0407-1211
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 57 13113 Object Summary
pks0405.dat 69 621 PKS0405-123 spectroscopic table
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See also:
J/ApJS/193/28 : Galaxy survey around 20 UV-bright quasars (Prochaska+, 2011)
J/ApJ/617/718 : Atomic data and EW for PKS 0405-123 (Prochaska+, 2004)
http://www.ucolick.org/~xavier/WFCCDOVI/ : WFCCD OVI Database
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- [PWC2006b] Running identification number (slit)
7- 8 I2 h RAh Hour of Right Ascension (J2000)
10- 11 I2 min RAm Minute of Right Ascension (J2000)
13- 16 F4.1 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- Sign of the Declination (J2000)
19- 20 I2 deg DEd Degree of Declination (J2000)
22- 23 I2 arcmin DEm Arcminute of Declination (J2000)
25- 26 I2 arcsec DEs Arcsecond of Declination (J2000)
28- 32 F5.2 mag Rmag The R band magnitude
34- 37 F4.2 mag e_Rmag Error in Rmag
39- 42 F4.2 --- S/G SExtractor Star/galaxy classifier (1)
44- 47 F4.1 arcsec2 Area Object area
49 I1 --- n_[PWC2006b] [1/7] Status of object ID (2)
51- 57 F7.5 --- z ? Redshift
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Note (1): Values near unity indicate a stellar-like point-spread function.
Note (2): Status is a bitwise composition (sum) with meaning:
1 = Photometry
2 = Spectrum taken
4 = Redshift determined
Spectra therefore exist for values of 2 or larger.
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Byte-by-byte Description of file: pks0405.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- [PWC2006b] Running identification number (slit)
6 A1 --- --- [a]
8- 9 I2 h RAh Hour of Right Ascension (J2000)
11- 12 I2 min RAm Minute of Right Ascension (J2000)
14- 17 F4.1 s RAs Second of Right Ascension (J2000)
19 A1 --- DE- Sign of the Declination (J2000)
20- 21 I2 deg DEd Degree of Declination (J2000)
23- 24 I2 arcmin DEm Arcminute of Declination (J2000)
26- 27 I2 arcsec DEs Arcsecond of Declination (J2000)
29- 33 F5.2 mag Rmag ?=0.0 The R band magnitude
35- 41 F7.4 --- z ?=-1.0000 Redshift
43- 69 A27 --- FileName Name of the file containing the spectra at
the WFCCDOVI Database (1)
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Note (1): Spectra at http://www.ucolick.org/~xavier/WFCCDOVI/PKS0405-123/
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History:
* 24-Aug-2007: From electronic version of the journal; table pks0405.dat from
http://www.ucolick.org/~xavier/WFCCDOVI/PKS0405-123/
* 10-Jan-2008: table pks0405.dat restricted to 'a' spectra.
References:
Prochaska et al., Paper I 2004ApJ...617..718P 2004ApJ...617..718P, Cat. J/ApJ/617/718
Chen et al., Paper II 2005ApJ...629L..25C 2005ApJ...629L..25C
Prochaska et al., Paper IV 2011ApJS..193...28P 2011ApJS..193...28P, Cat. J/ApJS/193/28
Prochaska et al., Paper V 2011ApJ...740...91P 2011ApJ...740...91P, Cat. J/ApJ/740/91
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 24-Aug-2007