J/ApJ/859/52ivo://CDS.VizieR/J/ApJ/859/52doi:10.26093/cds/vizier.18590052CDSOrdenes-Briceno Y.Eigenthaler P.Taylor M.A.Puzia T.H.,Alamo-Martinez K.Ribbeck K.X.Munoz R. PZhang H.Grebel E.K.,Angel S.Cote P.Ferrarese L.Hilker M.Lancon A.Mieske S.,Miller B.W.Rong Y.Sanchez-Janssen R.2020-08-25T13:23:22Z2019-05-23T15:24:31ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesvisible-astronomygalaxy-classification-systemsabsolute-magnitudesurveysWe report the discovery of 271 previously undetected dwarf galaxies in the outer Fornax cluster regions at radii r_vir_/4<r<r_vir_/2 using data from the Next Generation Fornax Survey (NGFS) with deep coadded u', g', and i' images obtained with Blanco/DECam at Cerro Tololo Interamerican Observatory. From the 271 dwarf candidates, we find 39 to be nucleated. Together with our previous study of the central Fornax region, the new dwarfs detected with NGFS data number 392, of which 56 are nucleated. The total Fornax dwarf galaxy population from NGFS and other catalogs rises, therefore, to a total of 643 with 181 being nucleated, yielding an overall nucleation fraction of 28%. The absolute i'-band magnitudes for the outer NGFS dwarfs are in the range -18.80<=M_i'_<=-8.78 with effective radii r_eff,i'_=0.18-2.22kpc and an average Sersic index <n>_i'_=0.81. Nonnucleated dwarfs are found to be fainter and smaller by {Delta}<M_i'_>=2.25mag and {Delta}<r_eff,i'_>=0.4kpc than the nucleated dwarfs. We demonstrate a significant clustering of dwarf galaxies on scales <~100kpc, and projected surface number density profile estimates, {Sigma}_N_(r), show a concentration of dwarfs in the Fornax core region within r<~350kpc. {Sigma}_N_(r) has a flat distribution up to ~350kpc, beyond which it declines for the nonnucleated dwarfs. The nucleated dwarfs have a steeper {Sigma}N(r) distribution, are more concentrated toward NGC 1399, and are decreasing rapidly outwards. This is the first time the transition from cluster to field environment has been established for the very faint dwarf galaxy population with robust sample statistics.2018ApJ...859...52Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/859/52CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/180 : Galaxies in Fornax Cluster and five nearby groups (Ferguson+ 1990)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)J/ApJS/164/334 : ACS Virgo Cluster Survey. VI (Ferrarese+, 2006)J/ApJ/660/1186 : VCC galaxies classification with SDSS (Lisker+, 2007)J/A+A/463/503 : Early-type dwarf galaxies in Fornax cluster (Mieske+, 2007)J/A+A/486/697 : Hydra I Cluster Catalogue (HCC) (Misgeld+, 2008)J/MNRAS/414/3052 : HST/ACS Coma Cluster Survey. VI. (den Brok+, 2011)J/ApJS/197/21 : The Carnegie-Irvine Galaxy Survey (CGS). I. (Ho+, 2011)J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)J/ApJ/763/40 : UBVI phot. of GCs in the Fornax galaxy cluster (Kim+, 2013)J/ApJ/813/L15 : Dwarf galaxies in Fornax cluster from NGFS (Munoz+, 2015)J/ApJ/844/157 : Ultradiffuse galaxies in deep HST images of HFF (Lee+, 2017)J/A+A/605/A46 : Sgr dSph nucleus star abundances (Mucciarelli+, 2017)J/A+A/608/A142 : Fornax Deep Survey with VST. III. LSB gal. (Venhola+, 2017)J/ApJ/855/142 : Next Generation Fornax Survey (NGFS) II (Eigenthaler+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/859/52https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/859/52http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/859/52https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/859/52https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/859/52http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/859/52GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/859/52/table1 (Dwarf galaxies in the Fornax cluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/859/52/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/859/52/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/859/52/table1?GETtext/xml+votable180.050000true51.5030833-36.79438890.0055555555555555565/8627 8632 8634 8635 8636 6/34487 34493 34506 34507 34520 34522 34532 34533 34535 34552 34554 35905 359082.3230668610021367e-19 2.798884916845955e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/859/52?format=asciiOpticaldefaultJ/ApJ/859/52/table1Dwarf galaxies in the Fornax clustern[0.1/2.5] Sersic index (2)stat.fit.paramfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNGFSIdentification (HHMMSS+DDMMSS; J2000)meta.id;meta.maincharRAJ2000[3] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[32/38] Degree of Declination (J2000)pos.eq.dec;meta.mainimag[12.7/22.8] CTIO/DECam i band magnitudemagphot.mag;em.opt.IfloatiMag[-18.8/-8.7] Absolute i band magnitude (1)magphys.magAbsfloatReff1[1.8/23] Effective radius in arcsecondsarcsecphys.angSizefloatReff2[0.1/2.3] Effective radius in kpc (1)kpcphys.size.radiusfloatTypeMorphological type (o=non-nucleated or x=nucleated dwarf galaxy)meta.codecharFCC[44/337]? Identifier from the Fornax Cluster Catalog (Ferguson+ 1990, VII/180)meta.id.crossintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar