J/AJ/121/148ivo://CDS.VizieR/J/AJ/121/148doi:10.26093/cds/vizier.51210148CDSCarrasco E.R.De Oliveira C.M.Infante L.Bolte M.2023-04-06T16:50:41Z2005-03-06T13:57:44ZCDS support team

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

cds-question@unistra.frccd-photometrysurface-photometrygalaxy-clustersWe present V and I CCD photometry of suspected low surface brightness dwarf galaxies detected in a survey covering ~2.4 deg^2^ around the central region of the Dorado group of galaxies. The low surface brightness galaxies were chosen based on their sizes and magnitudes at the limiting isophote of 26V{mu}. The selected galaxies have magnitudes brighter than V~20 (MV~-11 for an assumed distance to the group of 17.2 Mpc), with central surface brightnesses {mu}_0_>22.5 Vmag.arcsec^-2^, scale lengths h>2", and diameters >=14" at the limiting isophote. Using these criteria, we identified 69 dwarf galaxy candidates. Four of them are large very low surface brightness galaxies that were detected on a smoothed image, after masking high surface brightness objects. Monte Carlo simulations performed to estimate completeness, photometric uncertainties and to evaluate our ability to detect extended low surface brightness galaxies show that the completeness fraction is, on average, >80% for dwarf galaxies with -17<MV<-10.5 and 22.5<{mu}_0_<25.5 Vmag.arcsec^-2^, for the range of sizes considered by us (D>=14"). The V-I colors of the dwarf candidates vary from -0.3 to 2.3 with a peak on V-I=0.98, suggesting a range of different stellar populations in these galaxies. The projected surface density of the dwarf galaxies shows a concentration toward the group center similar in extent to that found around five X-ray groups and the elliptical galaxy NGC 1132 studied by Mulchaey & Zabludoff (1999ApJ...514..133M), suggesting that the dwarf galaxies in Dorado are probably physically associated with the overall potential well of the group.2001AJ....121..148Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/121/148CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/121/148https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/121/148http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/121/148https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/121/148https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/121/148http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/121/148GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/121/148/table3 (Photometric Data and Profile Fit Parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/121/148/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/121/148/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/121/148/table3?GETtext/xml+votable180.050000true64.29125-56.19750.0055555555555555565/8488 6/33270-33271 33279 33930 33934 33960https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/121/148?format=asciiOpticaldefaultJ/AJ/121/148/table3Photometric Data and Profile Fit ParametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intIDDwarf galaxy identificationcharf_ID[f] Indicates not detected in I filter (see section 2.7)charRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagTotal V-band magnitude (1)magfloatV-I? The V-I color (1)magfloatnullableD26Limiting isophotal diameter at 26 V mag/arcsec^2^arcsecfloatf_D26[e] Flag on D26 (2)charTheta26Eq. (4) diameter at 26 V mag/arcsec^2^arcsecfloatf_Theta26[e] Flag on Theta26 (2)charMu0Extrapolated central surface brightness in Vmag.arcsec**-2floatSclScale lengtharcsecfloatRadEffective radiusarcsecfloatMueffMean effective surface brightnessmag.arcsec**-2floatTypeMorphological type (see section 3.1)charf_TypeFlag on Type (3)char