J/MNRAS/456/1607ivo://CDS.VizieR/J/MNRAS/456/1607doi:10.26093/cds/vizier.74561607CDSDavies J.I.Davies L.J.M.Keenan O.C.2024-08-15T20:17:17Z2016-11-10T12:22:07ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesphotometryWe have used data from the Next Generation Virgo Survey to investigate the dwarf galaxy population of the Virgo cluster. We mask and smooth the data, and then use the object detection algorithm SExtractor to make our initial dwarf galaxy selection. All candidates are then visually inspected to remove artefacts and duplicates. We derive parameters to best select low surface brightness galaxies using central surface brightness values of 22.5<={mu}^g^_0_<=26.0{mu}g and exponential scale lengths of 3.0<=h<=10.0-arcsec to identify 443 cluster dwarf galaxies - 303 of which are new detections, with a surface density that decreases with radius from the cluster centre. We also apply our selection algorithm to 'background', non-cluster, fields and find zero detections. In combination, this leads us to believe that we have isolated a cluster dwarf galaxy population. The range of objects we detect is limited because smaller scale sized galaxies are confused with the background, while larger galaxies are split into numerous smaller objects by the detection algorithm. Combining our data with that from other surveys, we find a faint-end slope to the luminosity function of -1.35+/-0.03, which is not significantly different to what has previously been found, but is a little steeper than the slope for field galaxies. There is no evidence for a faint-end slope steep enough to correspond with galaxy formation models, unless those models invoke either strong feedback processes or use warm dark matter.2016MNRAS.456.1607Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/456/1607CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/266 : Atlas of Virgo galaxies (McDonald+ 2011)J/A+A/343/86 : Virgo cluster radio luminosity function. I. (Gavazzi+ 1999)J/A+A/396/449 : H{alpha} surface photometry in Virgo (Gavazzi+, 2002)J/A+A/417/499 : Spectrophotometry of Virgo cluster galaxies (Gavazzi+, 2004)J/A+A/590/A27 : CO spectra of Virgo cluster galaxies (Grossi,+, 2016)J/ApJS/215/22 : The Extended Virgo Cluster Catalog (EVCC) (Kim+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/456/1607https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/456/1607http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/456/1607https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/456/1607https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/456/1607http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/456/1607GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/456/1607/table1 (The LSBVCC galaxy sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/456/1607/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/456/1607/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/456/1607/table1?GETtext/xml+votable180.050000true187.882511.6030.0055555555555555565/6590 6928 6934-6935 6940-6941 6943 6976 6978-6979 6984 6986-6987 7008 6/26345-26348 26350-26351 26366-26367 26538 26542 27717 27720 27723 27726-27727 27730-27733 27735 27748-27750 27769 27857-27862 27868 27908 27910-27911 27928 27930-27931 27940 27942-27943 27953-27955 27960 28036-28038 28041 28044 28048 28050https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/456/1607?format=asciidefaultJ/MNRAS/456/1607/table1The LSBVCC galaxy samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLSBVCCLSBVCC identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.maingmagCFHT g band apparent magnitudemagphot.mag;em.opt.RfloatSuBrgg band central surface brightnessmag.arcsec**-2phot.mag.sbfloatSLgg band exponential scale lengtharcsecsrc.morph.scLengthfloatSimbadSimbad column added by the CDSmeta.ref.urlchar