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J/ApJ/810/138         ETGs sample for the Coma cluster        (Riguccini+, 2015)

Mid-IR enhanced galaxies in the Coma & Virgo clusters: lenticulars with a high star formation rate. Riguccini L., Temi P., Amblard A., Fanelli M., Brighenti F. <Astrophys. J., 810, 138 (2015)> =2015ApJ...810..138R (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Photometry, infrared Keywords: galaxies: clusters: general - galaxies: elliptical and lenticular, cD - galaxies: star formation Abstract: We explore the properties of early-type galaxies (ETGs), including ellipticals (E) and lenticulars (S0), in rich environments, such as clusters of galaxies (Virgo and Coma). The L24/LK distribution of ETGs in both Virgo and Coma clusters shows that some S0s have a much larger L24/LK ratio (0.5 to ∼2 dex) than the bulk of the ETG population. This could be interpreted as an enhanced star formation rate in these lenticulars. We compare the optical colors of galaxies in these two clusters and investigate the nature of these sources with a large L24/LK ratio by looking at their spatial distribution within the cluster, analyzing their optical spectra, and looking at their optical colors compared to late-types. We obtain 10 Coma and 3 Virgo early-type sources with larger L24/LK ratios than the bulk of their population. We call these sources mid-infrared enhanced galaxies (MIEGs). In Coma, they are mostly located in the southwest part of the cluster where a substructure is falling onto the main cluster. MIEGs present a lower g-r color than the rest of the ETG sample because of a blue continuum. We interpret the excess L24/LK ratio as evidence for enhanced star formation induced as a consequence of their infall into the main cluster. Description: For the Coma Cluster, we utilize the work of Mahajan et al. (2010, J/MNRAS/404/1745) to build our ETG sample. Mahajan et al. (2010, J/MNRAS/404/1745) used a combination of MIPS 24 µm observations and SDSS photometry and spectra to investigate the star formation history of galaxies in the Coma supercluster. All of their galaxies from the SDSS data in the Coma supercluster region are brighter than r∼17.77, the completeness limit of the SDSS spectroscopic galaxy catalog. Their 24 µm fluxes are obtained from archival data covering 2x2 deg2 for Coma Cluster. Our final sample of 124 sources is composed of 49 ellipticals and 75 lenticulars. Objects: ------------------------------------------------------ RA (ICRS) DE Designation(s) ------------------------------------------------------ 12 59 48.7 +27 58 50 Coma cluster = ACO 1656 ------------------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 70 124 Early Type Sample for the Coma Cluster
See also: VII/159 : Catalogue of galaxies towards the Coma Supercluster (Slezak+ 1988) J/A+A/303/661 : Star-forming galaxies in the Coma Cluster (Donas+, 1995) J/A+A/395/753 : Spectroscopy of Coma early-type galaxies. II. (Wegner+, 2002) J/A+A/407/423 : Coma cluster early-type galaxies. III. (Mehlert+, 2003) J/MNRAS/404/1745 : Dwarf galaxies in Coma supercluster (Mahajan+, 2010) J/AJ/142/148 : IR observations of galaxies in the Coma cluster (Edwards+, 2011) J/MNRAS/440/1690 : Bulge and disc colours of ETG in Coma (Head+, 2014) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 7 F7.3 deg RAdeg Right Ascension in decimal degrees (J2000) (1) 9- 14 F6.3 deg DEdeg Declination in decimal degrees (J2000) (1) 16- 20 F5.1 Mpc Dist Adopted distance (2) 22- 25 F4.1 --- T Morphological T parameter obtained from the Hyperleda database (Paturel et al. 2003A&A...412...45P, Cat. VII/237) 27- 32 F6.3 mJy F24 Spitzer/MIPS 24µm flux density from Mahajan et al. (2010, J/MNRAS/404/1745) 34- 38 F5.3 mJy e_F24 Uncertainty in F24 provided to us by private communication from Mahajan 40- 44 F5.2 mag Ksmag 2MASS Ks-band magnitude 46 I1 --- AGN [0/3]? AGN classification from Mahajan et al. (2010, J/MNRAS/404/1745) (3) 48- 52 F5.2 [10-7W] logL24 Log of the 24µm luminosity (in erg/s) 54- 58 F5.2 [Lsun] logLKs Log of the Ks-band luminosity 60- 64 F5.2 mag W4mag ? WISE W4-band magnitude (22µm) 66- 70 F5.2 mag e_W4mag ? Uncertainty in W4mag
Note (1): RAdeg and DEdeg as listed in Mahajan et al. (2010, J/MNRAS/404/1745). Note (2): Converted from the redshift measurements from Mahajan et al. (2010, J/MNRAS/404/1745), using H0=70 km/s/Mpc. Note (3): Classification as follows: 0 = Unclassified source; 1 = Star forming galaxy; 3 = AGN.
History: From electronic version of the journal
(End) Prepared by Tiphaine Pouvreau [CDS] 20-Oct-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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