J/ApJ/769/52 SDSS luminous red galaxies concentrations (Wong+, 2013)
A new approach to identifying the most powerful gravitational lensing
telescopes.
Wong K.C., Zabludoff A.I., Ammons S.M., Keeton C.R., Hogg D.W.,
Gonzalez A.H.
<Astrophys. J., 769, 52 (2013)>
=2013ApJ...769...52W 2013ApJ...769...52W
ADC_Keywords: Gravitational lensing ; Clusters, galaxy ; Redshifts ;
Galaxies, optical
Keywords: galaxies: clusters: general; gravitational lensing: strong
Abstract:
The best gravitational lenses for detecting distant galaxies are those
with the largest mass concentrations and the most advantageous
configurations of that mass along the line of sight. Our new method
for finding such gravitational telescopes uses optical data to
identify projected concentrations of luminous red galaxies (LRGs).
LRGs are biased tracers of the underlying mass distribution, so lines
of sight with the highest total luminosity in LRGs are likely to
contain the largest total mass. We apply this selection technique to
the Sloan Digital Sky Survey and identify the 200 fields with the
highest total LRG luminosities projected within a 3.5' radius over the
redshift range 0.1≤z≤0.7. The redshift and angular distributions of
LRGs in these fields trace the concentrations of non-LRG galaxies.
These fields are diverse; 22.5% contain one known galaxy cluster and
56.0% contain multiple known clusters previously identified in the
literature. Thus, our results confirm that these LRGs trace massive
structures and that our selection technique identifies fields with
large total masses. These fields contain two to three times higher
total LRG luminosities than most known strong-lensing clusters and
will be among the best gravitational lensing fields for the purpose of
detecting the highest redshift galaxies.
Description:
We select our sample of LRGs from the SDSS Data Release 9 (DR9; Ahn et
al. 2012, V/139). To improve the redshift accuracy of our sample, we
replace the luminous red galaxies (LRG) photometric redshifts and
errors with SDSS spectroscopic redshifts and errors where available,
which is roughly for one-third of the LRG sample.
We present a list of the 200 best beams as ranked by their total LRG
luminosity in Table 1. We choose a sample size of 200 because this is
roughly the beam rank above which our beams exceed the total LRG
luminosities of massive lensing clusters. In Table 2, we list the
3.5'-radius beams containing ≥11 LRGs that do not overlap with the
top 200 luminosity-sorted beams in Table 1.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 88 200 List of SDSS luminous red galaxy (LRG) beams
table2.dat 35 149 List of unique beams sorted by number of LRGs
table3.dat 68 373 List of known clusters in SDSS LRG beams
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See also:
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
VII/190 : Zwicky Galaxy Catalog (Zwicky+ 1968)
J/ApJS/199/34 : Clusters of galaxies in SDSS-III (Wen+, 2012)
J/ApJ/757/22 : Strong and weak lensing analysis of A2261 (Coe+, 2012)
J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)
J/ApJS/191/254 : GMBCG galaxy cluster catalog from SDSS DR7 (Hao+, 2010)
J/ApJS/183/197 : Galaxy clusters identified from the SDSS-DR6 (Wen+, 2009)
J/AJ/137/4795 : Dynamical state of brightest cluster galaxies (Coziol+, 2009)
J/ApJ/675/234 : Mass functions for galaxies 0<z<4 (Perez-Gonzalez+, 2008)
J/ApJ/660/239 : MaxBCG cat. of 13823 SDSS galaxy clusters (Koester+, 2007)
J/MNRAS/379/867 : BCG C4 cluster catalog (Von Der Linden+, 2007)
J/ApJ/638/725 : Fundamental manifold of spheroids (Zaritsky+, 2006)
J/ApJ/633/174 : Spheroidals and bulge dominated galaxies (Treu+, 2005)
J/AJ/128/1017 : Northern Optical Cluster Survey. IV. (Lopes+, 2005)
J/MNRAS/351/265 : Cluster galaxy circular velocity function (Desai+, 2004)
J/AJ/125/2064 : Northern Optical Cluster Survey. II. (Gal+, 2003)
J/AJ/123/1807 : SDSS galaxy clusters redshifts (Goto+, 2002)
J/ApJS/133/1 : GIS catalog project : source catalog (Ueda+, 2001)
J/ApJS/129/435 : NORAS galaxy cluster survey. I. (Bohringer+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Rank [1/200] Rank by total LRG luminosity
5- 6 I2 h RAh Hour of right ascension (J2000)
8- 9 I2 min RAm Minute of right ascension (J2000)
11- 16 F6.3 s RAs Second of right ascension (J2000)
18 A1 --- DE- Sign of declination (J2000)
19- 20 I2 deg DEd Degree of declination (J2000)
22- 23 I2 arcmin DEm Arcminute of declination (J2000)
25- 30 F6.3 arcsec DEs Arcsecond of declination (J2000)
32- 33 I2 --- Nlrg [4/18] Number of LRGs
35- 39 F5.2 [Lsun] logLi [11.8/12.1] Total rest-frame i-band
luminosity in LRGs (in h-2Lsun unit) (G1)
41- 45 F5.2 [Lsun] logLiM [11.4/12.1] Median of Monte Carlo total
luminosity distribution (in h-2L☉) (G1)
47- 51 F5.2 [Lsun] E_logLiM [0/0.3] Positive error on logLiM (1)
53- 57 F5.2 [Lsun] e_logLiM [-0.3/-0.02] Negative error on logLiM (1)
59- 61 I3 --- MC [1/200] Rank when ordered by median of
Monte Carlo total luminosity distribution
63- 86 A24 --- Comm Comment (2)
88 I1 --- Nc [1/6]? Known clusters number (3)
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Note (1): The error bars represent the difference between the median and the
16/84% quantiles of the distribution.
Note (2): "Overlap" with another beam means that the beam centers are separated
by <7' and can have LRGs in common.
Note (3): See Appendix C for details of known clusters in each beam and table 3.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Hour of right ascension (J2000)
4- 5 I2 min RAm Minute of right ascension (J2000)
7- 12 F6.3 s RAs Second of right ascension (J2000)
14 A1 --- DE- Sign of declination (J2000)
15- 16 I2 deg DEd Degree of declination (J2000)
18- 19 I2 arcmin DEm Arcminute of declination (J2000)
21- 26 F6.3 arcsec DEs Arcsecond of declination (J2000)
28- 29 I2 --- Nlrg [11/13] Number of luminous red galaxies (LRGs)
31- 35 F5.2 [Lsun] logLi [11.6/11.9] Total integrated rest-frame i-band
luminosity in LRG (in h-2L☉) (G1)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Rank [1/200] Rank
5- 6 I2 h RAh Hour of right ascension (J2000)
8- 9 I2 min RAm Minute of right ascension (J2000)
11- 16 F6.3 s RAs Second of right ascension (J2000)
18 A1 --- DE- Sign of declination (J2000)
19- 20 I2 deg DEd Degree of declination (J2000)
22- 23 I2 arcmin DEm Arcminute of declination (J2000)
25- 30 F6.3 arcsec DEs Arcsecond of declination (J2000)
32- 60 A29 --- Cluster Cluster name (1)
62- 68 F7.5 --- z [0/0.7]? Redshift (2)
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Note (1): Galaxy clusters identified from NASA/IPAC Extragalactic Database
(NED) within 3.5' of the beam centers (for clusters with multiple
designations, we list the first designation given by NED). Clusters
are sorted by proximity to the beam center. References are:
WHL = Wen et al. (2009, J/ApJS/183/197;
<[WHL2009] JHHMMSS.s+DDMMSS> in Simbad);
ZwCl = Zwicky et al. (1961, Cat. VII/190; <ZwCl HHMM+DDMM> in Simbad);
GMBCG = Hao et al. (2010, J/ApJS/191/254;
in Simbad);
MS = Ueda et al. (2001, J/ApJS/133/1; <1AXG JHHMMSS+DDMM> in Simbad);
Abell = Abell et al. (1989, VII/110; in Simbad);
MACS = Ebeling et al. (2001ApJ...553..668E 2001ApJ...553..668E);
NSC = Gal et al. (2003, J/AJ/125/2064; in Simbad);
EAD = Estrada et al. (2007ApJ...660.1176E 2007ApJ...660.1176E);
MaxBCG = Koester et al. (2007, J/ApJ/660/239;
<[KMA2007] DDD.ddddd+DD.ddddd> in Simbad);
NSCS = Lopes et al. (2004, J/AJ/128/1017; in Simbad);
SDSS CE = Goto et al. (2002, J/AJ/123/1807;
in Simbad);
SHELS = Geller et al. (2005ApJ...635L.125G 2005ApJ...635L.125G; in Simbad);
AWM = Abate et al. (2009ApJ...702..603A 2009ApJ...702..603A);
DDM = Desai et al. (2004, J/MNRAS/351/265).
Note (2): Redshift precision to lowest significant non-zero digit.
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Gloval Notes:
Note (G1): the cosmology assumes ΩM=0.274, ΩΛ=0.726,
and H0=100hkm/s/Mpc, with h=0.71.
History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 10-Dec-2014