J/ApJ/836/7ivo://CDS.VizieR/J/ApJ/836/7doi:10.26093/cds/vizier.18360007CDSMonroe J.T.Tran K.-V.H.Gonzalez A.H.2020-02-03T08:58:04Z2017-10-06T11:20:14ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryhst-photometryultraviolet-astronomyinfrared-photometryredshiftedWe use the Hubble Space Telescope to obtain WFC3/F390W imaging of the supergroup SG1120-1202 at z=0.37, mapping the UV emission of 138 spectroscopically confirmed members. We measure total (F390W-F814W) colors and visually classify the UV morphology of individual galaxies as "clumpy" or "smooth." Approximately 30% of the members have pockets of UV emission (clumpy) and we identify for the first time in the group environment galaxies with UV morphologies similar to the "jellyfish" galaxies observed in massive clusters. We stack the clumpy UV members and measure a shallow internal color gradient, which indicates that unobscured star formation is occurring throughout these galaxies. We also stack the four galaxy groups and measure a strong trend of decreasing UV emission with decreasing projected group distance (R_proj_). We find that the strong correlation between decreasing UV emission and increasing stellar mass can fully account for the observed trend in (F390W-F814W)-R_proj_, i.e., mass-quenching is the dominant mechanism for extinguishing UV emission in group galaxies. Our extensive multi-wavelength analysis of SG1120-1202 indicates that stellar mass is the primary predictor of UV emission, but that the increasing fraction of massive (red/smooth) galaxies at R_proj_<~2R_200_ and existence of jellyfish candidates is due to the group environment.2017ApJ...836....7Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/836/7CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/500/714 : Color-magnitude relation in CL 1358+62 (Van Dokkum+ 1998)J/ApJ/496/39 : Properties of poor groups of galaxies. I. (Zabludoff+ 1998)J/ApJS/137/117 : Las Campanas Distant Cluster Survey (LCDCS) (Gonzales+, 2001)J/ApJ/549/172 : X-ray-detected, poor groups galaxy populations (Tran+, 2001)J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/836/7https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/836/7http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/836/7https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/836/7https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/836/7http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/836/7GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/836/7/table2 (Observed properties of supergroup members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/836/7/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/836/7/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/836/7/table2?GETtext/xml+votable180.050000true170.099167-12.057250.0055555555555555566/25332 253346.772611666688002e-21 5.645017022762991e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/836/7?format=asciiUVInfrareddefaultJ/ApJ/836/7/table2Observed properties of supergroup membersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIdentifier (JHHMMSS.s+DDMMSS.s)meta.id;meta.maincharz[0.3/0.4] Spectroscopic redshiftsrc.redshiftfloatRproj[0/932] Projected radiuskpcphys.size.radiusintF24[0.03/6.1]? Spitzer/MIPS 24um flux density (1)mJyphot.flux.density;em.IR.15-30umfloatnullableRhalf[0.4/6.6] Half-light radius in F814W image (2)kpcphys.size.radius;obs.imagefloatF814Wmag[18.5/23.4] HST/ACS F814W band magnitude (3)magphot.mag;em.opt.Ifloate_F814Wmag[0.001/0.03] Uncertainty in F814Wmagmagstat.errorfloatF390Wmag[20.7/25.5] HST/WFC3 F390W band magnitude (3)magphot.mag;em.opt.Ufloate_F390Wmag[0.002/0.08] Uncertainty in F390Wmagmagstat.errorfloatlogMass[8/12] Log stellar mass (4)log(solMass)phys.massfloatClumpyClumpy ("Clumpy" (39 occurrences), "Smooth" or "Unclassified" (8 occurrences))src.classcharf_Clumpy[J] J = Jellyfish candidatemeta.codecharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from names (right ascension part)degpos.eq.ra;meta.main_DEPositions from names (declination part)degpos.eq.dec;meta.main