J/MNRAS/459/4450ivo://CDS.VizieR/J/MNRAS/459/4450doi:10.26093/cds/vizier.74594450CDSWittmann C.Lisker T.Pasquali A.Hilker M.Grebel E.K.2024-08-16T20:17:02Z2017-10-27T13:48:29ZCDS support team

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

cds-question@unistra.frgalaxy-clustersradial-velocitygalaxy-classification-systemsWe search for hints to the origin and nature of compact stellar systems in the magnitude range of ultracompact dwarf galaxies in deep wide-field imaging data of the Fornax cluster core. We visually investigate a large sample of 355 spectroscopically confirmed cluster members with V-band equivalent magnitudes brighter than -10mag for faint extended structures. Our data reveal peculiar compact stellar systems, which appear asymmetric or elongated from their outer light distribution. We characterize the structure of our objects by quantifying their core concentration, as well as their outer asymmetry and ellipticity. For the brighter objects of our sample we also investigate their spatial and phase-space distribution within the cluster. We argue that the distorted outer structure alone that is seen for some of our objects, is not sufficient to decide whether these systems have a star cluster or a galaxy origin. However, we find that objects with low core concentration and high asymmetry (or high ellipticity) are primarily located at larger cluster-centric distances as compared to the entire sample. This supports the hypothesis that at least some of these objects may originate from tidally stripped galaxies.2016MNRAS.459.4450Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/459/4450CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/459/4450https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/459/4450http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/459/4450https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/459/4450https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/459/4450http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/459/4450GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/459/4450/table1 (Compilation of compact stellar systems known to be Fornax cluster members, based on previous publications)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/459/4450/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/459/4450/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/459/4450/table1?GETtext/xml+votable180.050000true53.9119583-35.36480560.0055555555555555565/8633 6/https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/459/4450?format=asciiOpticaldefaultJ/MNRAS/459/4450/table1Compilation of compact stellar systems known to be Fornax cluster members, based on previous publicationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintparamindicates parameters in table 3meta.ref.urlcharSeq[1/904] Sequential numbermeta.recordintprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSimbadObject identifier of the SIMBAD database, referring to the publication the object was taken frommeta.idcharHVHeliocentric velocity with the smallest error from all compiled velocities for an objectkm/sstat.error;spect.dopplerVeloc;pos.heliocentricinte_HVrms uncertainty in HVkm/sstat.errorintr_HVLiterature source for the adopted velocity (1)meta.ref;pos.frameintJ/MNRAS/459/4450/table3Parameter catalogue for the working of spectroscopically confirmed Fornax cluster members with m_Ve_<21.5magrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/904] Sequential numbermeta.recordintVemagApparent V-equivalent magnitudemagphot.mag;em.opt.Vfloate_Vemagrms uncertainty on Vemagmagstat.error;phot.mag;em.opt.Vfloatf_Vemag[1/2] Magnitude flag (1)meta.codeintCCCore concentration (uncorrected values)phys.size;arith.ratiofloatCCcorrPSF-corrected core concentrationphys.size;arith.ratiofloatRA? Residual asymmetrysrc.morph.paramnullablee_RA? rms uncertainty on RAstat.error;pos.eq.rafloatnullableEll? Ellipticitysrc.ellipticityfloatnullablee_Ell? rms uncertainty on Ellstat.errorfloatnullableSub? Subsample (2)meta.noteintnullableSubAlt? Alternative subsample (2)meta.noteintnullableRegionPSF-region of the objectobs.fieldint