J/A+A/611/A42ivo://CDS.VizieR/J/A+A/611/A42doi:10.26093/cds/vizier.36110042CDSBoissier S.Cucciati O.Boselli A.Mei S.Ferrarese L.2020-01-13T12:19:57Z2018-03-20T08:16:37ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesphotometryultraviolet-photometryspectroscopyAt low redshift, early-type galaxies often exhibit a rising flux with decreasing wavelength in the 1000-2500{AA} range, called "UV upturn". The origin of this phenomenon is debated, and its evolution with redshift is poorly constrained. The observed GALEX FUV-NUV color can be used to probe the UV upturn up to redshift about 0.5. We aim to provide constraints on the existence of the UV upturn up to redshift ~0.4 in Brightest Cluster Galaxies (BCG) galaxies located behind the Virgo cluster, using data from the GUViCS survey. We estimate the FUV and NUV observed magnitudes for BCGs from the maxBCG catalog in the GUViCS fields. We increase the number of non local galaxies identified as BCGs with GALEX photometry from a few tens of galaxies to 166 (64 when restricting this sample to relatively small error-bars). We also estimate a central color within a 20-arcsec aperture. By using the r band luminosity from the maxBCG catalog, we can separate blue FUV-NUV due to recent star formation and candidate upturn cases. We use Lick indices to verify their similitude to redshift 0 upturn cases. We clearly detect a population of blue FUV-NUV BCGs in the redshift range 0.10-0.35, vastly improving the existing constraints at these epochs by increasing the number of galaxies studied, and by exploring a redshift range with no previous data (beyond 0.2), spanning 1 more Gyr in the past. These galaxies bring new constrains that can help distinguish between assumptions concerning the stellar populations causing the UV upturn phenomenon. The existence of a large number of UV upturns around redshift 0.25 favors the existence of a binary channel among the sources proposed in the literature.2018A&A...611A..42Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/611/A42CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/660/239 : 13823 galaxy clusters MaxBCG catalog from SDSS (Koester+ 2007)J/A+A/528/A107 : GALEX Ultraviolet Virgo Cluster Survey, GUViCS (Boselli+ 2011)J/A+A/569/A124 : GUViCS. Ultraviolet Source Catalogs (Voyer+, 2014)J/A+A/570/A69 : GALEX Ultraviolet Virgo Cluster Survey. IV. (Boselli+, 2014)J/A+A/579/A29 : The GUViCS FUV diffuse emission (Boissier+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/611/A42https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/611/A42http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/611/A42https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/611/A42https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/611/A42http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/611/A42GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/611/A42/table2 (and basic properties from Koester+2007)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/611/A42/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/611/A42/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/611/A42/table2?GETtext/xml+votable180.050000true188.572789.76623810.0055555555555555565/6572-6573 6986 7008 6/26223 26265 26268 26270 26279 26285-26287 26296 26308-26309 26311 26322 26328 26332 26338 26349 26356 26362-26365 26367 26540-26542 27648-27649 27652 27654-27655 27677 27679 27714-27715 27720-27722 27724-27725 27729-27731 27735-27737 27740-27741 27743-27745 27748 27753 27755 27757 27762-27763 27765-27767 27769-27771 27773 27775 27841 27844 27856-27857 27860-27862 27864 27867-27868 27871 27888 27904-27906 27908-27910 27914 27932 27937-27938 27941-27942 27948-27950 27954 27967 28003 28036 28054 28074https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/611/A42?format=asciiUVdefaultJ/A+A/611/A42/table2and basic properties from Koester+2007SimbadNameSimbad column added by the CDSmeta.idcharDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintK2007Display the Koester et al. (2007, Cat. J/ApJ/660/239) datameta.ref.urlcharIDID number from Koester et al. (2007, Cat. J/ApJ/660/239), BCG NNNNN)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainzphPhotometric redshiftsrc.redshiftdoubleLrr band lumininosity (10^10^Lsol)1e+10solLumphys.luminositydoubleLii band lumininosity (10^10^Lsol)1e+10solLumphys.luminositydoubleJ/A+A/611/A42/table3Spectroscopic information from SDSSrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID number from Koester et al. (2007, Cat. J/ApJ/660/239), BCG NNNNN)meta.id;meta.maincharzspSpectroscopic redshiftsrc.redshift;pos.heliocentricdoubleClassSDSS sub classmeta.code.classcharMg2? Mg2 indexspect.indexdoublenullablee_Mg2? Uncertainty on Mg2stat.errordoublenullableHb? Hbeta indexspect.index;em.line.Hbetadoublenullablee_Hb? Uncertainty on Hbstat.errordoublenullableJ/A+A/611/A42/table4UV photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID number from Koester et al. (2007, Cat. J/ApJ/660/239), BCG NNNNN)meta.id;meta.maincharExpFUVExposure time FUVstime.duration;obs.exposure;em.UV.100-200nmintExpNUVExposure time NUVstime.duration;obs.exposure;em.UV.200-300nmintAperBest aperture (in pixels)pixphys.angSize;instr.fovintFUV? AB FUV magnitudemagphot.mag;em.UV.100-200nmfloatnullableE_FUV? Error on FUV (+1 sigma)magstat.error;stat.maxfloatnullablee_FUV? Error on FUV (-1 sigma)magstat.errorfloatnullableNUVAB NUV magnitudemagphot.mag;em.UVfloatE_NUVError on NUV (+1 sigma)magstat.error;stat.maxfloate_NUVError on NUV (-1 sigma)magstat.errorfloatcF-N? Central FUV-NUV colormagphot.color;em.UV.100-200nm;em.UV.200-300nmfloatnullableE_cF-N? Error on cF-N (+1 sigma)magstat.error;stat.maxfloatnullablee_cF-N? Error on cF-N (-1 sigma)magstat.errorfloatnullableJ/A+A/611/A42/table5Our flags and notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID number from Koester et al. (2007, Cat. J/ApJ/660/239), BCG NNNNN)meta.id;meta.maincharfFUVFlag FUVmeta.codecharfNUVFlag NUVmeta.codecharNotesComments on morphologymeta.notechar