/ftp/cats/J_ApJS/176/39



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J/ApJS/176/39     IR survey of brightest cluster galaxies I.    (Quillen+, 2008)
The following files can be converted to FITS (extension .fit or fit.gz)
	table1.dat table2.dat table3.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJS/176/39
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Beginning of ReadMe : J/ApJS/176/39 IR survey of brightest cluster galaxies I. (Quillen+, 2008) ================================================================================ An infrared survey of brightest cluster galaxies. I. Quillen A.C., Zufelt N., Park J., O'Dea C.P., Baum S.A., Privon G., Noel-Storr J., Edge A., Russell H., Fabian A., Donahue M., Bregman J.N., McNamara B.R., Sarazin C.L. <Astrophys. J. Suppl. Ser., 176, 39-58 (2008)> =2008ApJS..176...39Q ================================================================================ ADC_Keywords: Galaxies, IR ; Clusters, galaxy ; Photometry, infrared ; Surveys Keywords: cooling flows - galaxies: active - galaxies: clusters: general galaxies: elliptical and lenticular, cD - infrared: galaxies stars: formation Abstract: We report on an imaging survey with the Spitzer Space Telescope of 62 brightest cluster galaxies (BCGs) with optical line emission. These galaxies are located in the cores of X-ray luminous clusters selected from the ROSAT All-Sky Survey. We find that about half of these sources have a sign of excess infrared emission; 22 objects out of 62 are detected at 70um, 18 have 8/5.8um flux ratios above 1.0 and 28 have 24/8um flux ratios above 1.0. Altogether 35 of 62 objects in our survey exhibit at least one of these signs of infrared excess. Four galaxies with infrared excesses have a 4.5/3.6um flux ratio indicating the presence of hot dust, and/or an unresolved nucleus at 8um. Three of these have high measured [OIII](5007AA)/Hbeta flux ratios suggesting that these four, Abell 1068, Abell 2146, Zwicky 2089, and R0821+07, host dusty active galactic nuclei (AGNs). Nine objects (including the four hosting dusty AGNs) have infrared luminosities greater than 10^11^L_sun_ and so can be classified as luminous infrared galaxies (LIRGs). Excluding the four systems hosting dusty AGNs, the excess mid-infrared emission in the remaining brightest cluster galaxies is likely related to star formation. Description: The 3.6, 4.5, 5.8, and 8.0um broadband images were obtained during cycle 3 (2007-2008) using the Infrared Array Camera (IRAC; Fazio et al., 2004ApJS..154...10F) onboard Spitzer. The 24.4 and 70um images were obtained using the Multiple Imaging Photometer for Spitzer (MIPS; Rieke et al., 2004ApJS..154...25R).