J/ApJ/743/34 WISE and SDSS-DR7 data in 69 galaxy clusters (Chung+, 2011)
A WISE view of star formation in local galaxy clusters.
Chung S.M., Eisenhardt P.R., Gonzalez A.H., Stanford S.A., Brodwin M.,
Stern D., Jarrett T.
<Astrophys. J., 743, 34 (2011)>
=2011ApJ...743...34C 2011ApJ...743...34C
ADC_Keywords: Clusters, galaxy ; Galaxies, IR ; Photometry, infrared ;
Redshifts ; Active gal. nuclei
Keywords: galaxies: clusters: general - galaxies: evolution -
galaxies: star formation - infrared: galaxies
Abstract:
We present results from a systematic study of star formation in local
galaxy clusters using 22um data from the Wide-field Infrared Survey
Explorer (WISE). The 69 systems in our sample are drawn from the
Cluster Infall Regions Survey, and all have robust mass
determinations. The all-sky WISE data enable us to quantify the amount
of star formation, as traced by 22um, as a function of radius well
beyond R200, and investigate the dependence of total star formation
rate upon cluster mass. We find that the fraction of star-forming
galaxies increases with cluster radius but remains below the field
value even at 3R200. We also find that there is no strong
correlation between the mass-normalized total specific star formation
rate and cluster mass, indicating that the mass of the host cluster
does not strongly influence the total star formation rate of cluster
members.
Description:
The photometry used for our analyses is point-spread function (PSF)
fitted magnitudes from the "first-pass operations co-add source
working database" created by the WISE data reduction pipeline.
Galaxies in our cluster sample have a diffraction-limited resolution
of 12" (FWHM) in the 22um band.
The clusters in this paper consist of the entire CIRS (Cluster Infall
Regions Survey (Rines & Diaferio 2006, Cat. J/AJ/132/1275) sample,
excluding three clusters at z≤0.006, which leaves 69 remaining
clusters with a minimum redshift of z=0.0204.
Optical photometric and spectroscopic data are obtained from the SDSS
Data Release 7 (Abazajian et al. 2009ApJS..182..543A 2009ApJS..182..543A, see Cat. II/294).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 136 List of demi-luminous IR galaxies (demi_LIRGs) from
69 clusters sorted in descending order of LIR
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See also:
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
J/ApJS/199/22 : UV to FIR photometry of galaxies (Hernandez-Fernandez+, 2012)
J/ApJ/693/1840 : A3266 galaxies at 24um (Bai+, 2009)
J/AJ/138/873 : Galaxies with Hα emission in A2151 (Cedres+, 2009)
J/ApJ/692/556 : Star forming galaxy templates (Rieke+, 2009)
J/ApJ/671/1503 : Cl 0024+16 and MS 0451-03 spectrophotometry (Moran+, 2007)
J/AJ/132/1275 : CIRS (Cluster Infall Regions in the SDSS). I. (Rines+, 2006)
J/ApJ/630/206 : Hα data for 3 EDisCS galaxy clusters (Finn+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [WISEPC]
8- 26 A19 --- WISEP WISE name (JHHMMSS.ss+DDMMSS.s)
28- 36 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
38- 46 F9.5 deg DEdeg Declination in decimal degrees (J2000)
48- 52 F5.3 --- z [0.029/0.105] SDSS-DR7 spectroscopic redshift
54- 57 F4.2 mag W4 [4.12/7.63] WISE W4-band (22um) magnitude
59- 63 F5.3 mag e_W4 [0.016/0.243] W4 uncertainty
65- 68 F4.1 Msun/yr SFR [4.6/90.3] Star formation rate
70- 76 E7.2 Lsun LIR [4.7e+10/7.2e+11] Infrared luminosity
78- 80 F3.1 --- Rproj [0/3] Projected distance from cluster center
in R200 units (2)
82- 84 A3 --- Flag AGN flag (AGN, SF or SF*) (1)
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Note (1): Flag is:
AGN = galaxies with WISE color W1-W2>0.5; they are assumed to have a
mid-IR flux dominated by an AGN rather than star formation.
SF = galaxies with WISE color W1-W2 consistent with star formation
SF* = galaxies with WISE color W1-W2 consistent with star formation but
classified Seyfert in BPT diagram (Baldwin-Phillips-Terlevich,
see 1981PASP...93....5B 1981PASP...93....5B)
Note (2): R200 is the radius within which the average density is 200
times the critical density of the universe
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 29-Apr-2013