J/ApJ/693/1840 A3266 galaxies at 24um (Bai+, 2009)
The infrared luminosity functions of rich clusters.
Bai L., Rieke G.H., Rieke M.J., Christlein D., Zabludoff A.I.
<Astrophys. J., 693, 1840-1850 (2009)>
=2009ApJ...693.1840B 2009ApJ...693.1840B
ADC_Keywords: Clusters, galaxy ; Photometry, infrared ; Galaxies, IR
Keywords: galaxies: clusters: individual (Abell 3266) - galaxies: luminosity
function, mass function - infrared: galaxies
Abstract:
We present Multiband Imaging Photometer observations of the cluster
A3266. About 100 spectroscopic cluster members have been detected at
24um. The infrared (IR) luminosity function (LF) in A3266 is very
similar to that in the Coma cluster down to the detection limit
LIR∼1043erg/s, suggesting a universal form of the bright-end IR LF
for local rich clusters with M∼1015M☉. The shape of the bright
end of the A3266-Coma composite IR LF is not significantly different
from that of nearby field galaxies, but the fraction of IR-bright
galaxies (star formation rate (SFR)>0.2M☉/yr) in both clusters
increases with cluster-centric radius. The decrease of the blue galaxy
fraction toward the high-density cores only accounts for part of the
trend; the fraction of red galaxies with moderate SFRs
(0.2M☉/yr<SFR<1M_☉/yr) also decreases with increasing galaxy
density. These results suggest that for the IR-bright galaxies nearby
rich clusters are distinguished from the field by a lower star forming
galaxy fraction, but not by a change in L*IR.
Description:
The A3266 cluster was observed by the Multiband Imaging Photometer for
Spitzer (MIPS) in medium scan map mode on 2005 June 28 at 24, 70, and
160um simultaneously. A rectangular 45'x60' region was mapped.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 48 109 Cluster galaxies with 24µm emission>0.25mJy
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See also:
J/ApJ/686/966 : Spitzer-FLS catalog of clusters of galaxies (Muzzin+, 2008)
J/ApJ/591/764 : R magnitudes for 6 nearby galaxy clusters (Christlein+, 2003)
J/AJ/112/36 : Velocities in Abell 3266 (Quintana+ 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.5 deg RAdeg Right Ascension in decimal degrees (J2000)
10- 18 F9.5 deg DEdeg Declination in decimal degrees (J2000)
20- 24 F5.3 --- z Redshift (spectroscopic)
26 I1 --- r_z Reference for z (1)
28- 32 F5.2 mJy F24 Spitzer/MIPS 24 micron band flux density
34- 37 F4.2 mJy e_F24 Uncertainty in F24
39- 43 F5.2 [10-7W] logLIR Log IR luminosity in ergs/s
45- 48 F4.1 Msun/yr SFR Star Formation Rate
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Note (1): References for redshifts as follows:
1 = Christlein & Zabludoff (2003, Cat. J/ApJ/591/764);
2 = Quintana et al. (1996, Cat. J/AJ/112/36);
3 = Green et al. (1990MNRAS.243..159G 1990MNRAS.243..159G).
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Nomenclature Notes:
Galaxies of the cluster are <[BRR2009] DD.ddddd+DD.ddddd> in Simbad.
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Mar-2011