J/ApJ/810/138ivo://CDS.VizieR/J/ApJ/810/138doi:10.26093/cds/vizier.18100138CDSRiguccini L.Temi P.Amblard A.Fanelli M.Brighenti F.2017-12-13T18:27:10Z2017-10-23T13:01:55ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-clustersgalaxiesphotometryinfrared-photometryWe 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 L_24_/L_K_ distribution of ETGs in both Virgo and Coma clusters shows that some S0s have a much larger L_24_/L_K_ 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 L_24_/L_K_ 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 L_24_/L_K_ 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 L_24_/L_K_ ratio as evidence for enhanced star formation induced as a consequence of their infall into the main cluster.2015ApJ...810..138Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/810/138CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/159 : Catalogue of galaxies towards the Coma SuperclusterJ/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.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 clusterJ/MNRAS/440/1690 : Bulge and disc colours of ETG in Coma (Head+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/810/138https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/810/138http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/810/138https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/810/138https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/810/138http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/810/138GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/810/138/table3 (Early Type for the Coma Cluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/810/138/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/810/138/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/810/138/table3?GETtext/xml+votable180.050000true194.47528.50.0055555555555555566/10378 10379 10382 10400 10401 281496.772611666688002e-21 1.000830682546041e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/810/138?format=asciiOpticalInfrareddefaultJ/ApJ/810/138/table3Early Type for the Coma ClusterSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000) (1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (1)degpos.eq.dec;meta.mainDistAdopted distance (2)Mpcpos.distance;pos.heliocentricfloatTMorphological T parameter obtained from the Hyperleda database (Paturel et al. 2003A&A...412...45P, Cat. VII/237)src.morph.paramfloatF24Spitzer/MIPS 24{mu}m flux density from Mahajan et al. (2010, J/MNRAS/404/1745)mJyphot.flux.density;em.IR.15-30umfloate_F24Uncertainty in F24 provided to us by private communication from MahajanmJystat.errorfloatKsmag2MASS K_s_-band magnitudemagphot.mag;em.IR.KfloatAGN[0/3]? AGN classification from Mahajan et al. (2010, J/MNRAS/404/1745) (3)meta.code.classintnullablelogL24Log of the 24{mu}m luminosity (in erg/s)log(1e-07W)phys.luminosity;em.IRfloatlogLKsLog of the K_s_-band luminositylog(solLum)phys.luminosity;em.IR.KfloatW4mag? WISE W4-band magnitude (22{mu}m)magphot.flux.density;em.IR.15-30umfloatnullablee_W4mag? Uncertainty in W4magmagstat.error;phot.magfloatnullableMHR2010Display data from Mahajan+, 2010, J/MNRAS/404/1745meta.ref.urlchar