J/MNRAS/445/630ivo://CDS.VizieR/J/MNRAS/445/630doi:10.26093/cds/vizier.74450630CDSPak M.Rey S.-C.Lisker T.Lee Y.Kim S.Sung E.-C.Jerjen H.,Chung J.2024-08-14T20:18:30Z2015-09-23T13:53:54ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxy-classification-systemsvisible-astronomysloan-photometryultraviolet-photometryUsing SDSS-DR7 and NASA/IPAC Extragalactic Database spectroscopic data, we identify 166 galaxies as members of the Ursa Major cluster with M_r_<-13.5mag. We morphological classify all galaxies by means of carefully inspecting g-, r-, i-band colour and monochromatic images. We show that the Ursa Major cluster is dominated by late-type galaxies, but also contains a significant number of early-type galaxies, particularly in the dwarf regime. We present further evidence for the existence of several subgroups in the cluster, consistent with previous findings. The early-type fraction is found to correlate with the mass of the subgroup. We also investigate environmental effects by comparing the properties of the Ursa Major early-type dwarf galaxies to those of the Virgo cluster. In contrast to the Virgo, the red sequence of the Ursa Major cluster is only sparsely populated in the optical and ultraviolet colour-magnitude relations. It also shows a statistically significant gap between -18<M_r_<-17mag, i.e. the Ursa Major cluster lacks early-type dwarf galaxies at the bright end of their luminosity function. We discover that the majority of early-type dwarf galaxies in the Ursa Major cluster have blue cores with hints of recent or ongoing star formation. We suggest that gravitational tidal interactions can trigger central blue star-forming regions in early-type dwarfs. After that, star formation would only fade completely when the galaxies experience ram-pressure stripping or harassment, both of which are nearly absent in the Ursa Major cluster.2014MNRAS.445..630Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/445/630CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/312 : GALEX-DR5 (GR5) sources from AIS and MIS (Bianchi+ 2011)II/294 : SDSS Photometric Catalog, DR 7 (Adelman-McCarthy+, 2009)J/AJ/112/2471 : The Ursa Major cluster. I. (Tully+ 1996)J/MNRAS/429/2264 : Anatomy of Ursa Majoris (Karachentsev+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/445/630https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/445/630http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/445/630https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/445/630https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/445/630http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/445/630GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/445/630/table2 (The Ursa Major cluster catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/445/630/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/445/630/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/445/630/table2?GETtext/xml+votable180.050000true169.251150.58470.0055555555555555565/1373 1407 1494-1495 6/5461 5463 5468-5469 5471 5490 5500-5501 5503 5581 5584 5586-5587 5589-5591 5593-5596 5598-5599 5617 5623 5625 5955-5956 5966-5967 5972 5974-5975 6004 10921 10923-10925 10927 10930-10932 10938 10952 10955 10976 10978-10982 10984-10985 10990-10991 11000 11002 11005-11006 11169 11176-11177 11179-11180 111822.040811542443644e-19 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/445/630?format=asciiUVOpticaldefaultJ/MNRAS/445/630/table2The Ursa Major cluster catalogueSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID number, UNNN (1)meta.idcharNameName (2)meta.id;meta.maincharRAJ2000Right ascension (J2000) from SExtractordegpos.eq.ra;meta.mainDEJ2000Declination (J2000) from SExtractordegpos.eq.dec;meta.mainSGLONSupergalactic longitudedegpos.supergalactic.lonSGLATSupergalactic latitudedegpos.supergalactic.latfloatHV[620/1208] Heliocentric radial velocity from SDSSkm/sspect.dopplerVeloc;pos.heliocentricintn_HV[N] N when HV adopted from NEDmeta.notecharV0Radial velocity that adjusted for the frame of the Local Group by adding 300sinlcosbkm/sphys.veloc;pos.lgintMemb[123, ] Membership from different catalogues (3)meta.code.membercharGroupName of group defined by Karachentsev et al. (2013) which the galaxy belongs tometa.idcharMTypeMorphology of galaxy classified from this studysrc.morphcharTT1[-3/10]? RC3 T-type from Tully et al. (1996, Cat. J/AJ/112/2471)meta.code;src.morphintnullableTT2[-3/10]? RC3 T-type from Karachentsev et al. (2013, Cat. J/MNRAS/429/2264)meta.code;src.morphintnullableumagSDSS u magnitudemagphot.mag;em.opt.Ufloate_umagrms uncertainty on umagmagstat.error;phot.mag;em.opt.UfloatgmagSDSS g magnitudemagphot.mag;em.opt.Bfloate_gmagrms uncertainty on gmagmagstat.error;phot.mag;em.opt.BfloatrmagSDSS r magnitudemagphot.mag;em.opt.Rfloate_rmagrms uncertainty on rmagmagstat.error;phot.mag;em.opt.RfloatimagSDSS i magnitudemagphot.mag;em.opt.Ifloate_imagrms uncertainty on imagmagstat.error;phot.mag;em.opt.IfloatzmagSDSS z magnitudemagphot.mag;em.opt.Ifloate_zmagrms uncertainty on zmagmagstat.error;phot.mag;em.opt.IfloatNUV? GALEX NUV magnitudemagphot.mag;em.UVfloatnullablee_NUV? rms uncertainty on NUVmagstat.errorfloatnullableFUV? GALEX FUV magnitudemagphot.mag;em.UV.100-200nmfloatnullablee_FUV? rms uncertainty on FUVmagstat.errorfloatnullableNote[bc] bc for blue-cored early-type dwarf galaxiesmeta.notecharSloanDisplay the SDSS data for this galaxymeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlchar