J/A+A/625/A94ivo://CDS.VizieR/J/A+A/625/A94doi:10.26093/cds/vizier.36250094CDSHamraz E.Peletier R. F.Khosroshahi H. G.Valentijn E. A.,den Brok M.Venhola A.2019-06-06T05:34:44Z2019-05-17T12:19:48ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesphotometryTo understand the stellar population content of dwarf early-type galaxies (dEs) and its environmental dependence, we compare the slopes and intrinsic scatter of color-magnitude relations (CMRs) for three nearby clusters, Fornax, Virgo and Coma. Additionally we present and compare internal color profiles of these galaxies to identify central blue regions with younger stars. We use the imaging of the HST/ACS Fornax cluster in the magnitude range of -18:7<=Mg0<=-16:0, to derive magnitudes, colors and color profiles, which we compare with literature measurements from the HST/ACS Virgo and Coma Cluster Survey. We benefit HST accuracy to investigate and parameterize the (g'-z') color profiles of these dEs. Based on analysis of the color profiles, we report a large number of dEs with young stellar populations in their center in all three clusters. While for Virgo and Coma the number of blue-cored dEs is found to be 85%+/-2% and 53%+/-3% respectively, for Fornax, we find that all galaxies have a blue core.We show that bluer cores reside in fainter dEs, similar to the trend seen in nucleated dEs. We find no correlation between the luminosity of the galaxy and the size of its blue core. Moreover, a comparison of the CMRs of the three clusters shows that the scatter in Virgo's CMR is considerably larger than in the Fornax and Coma clusters. Presenting adaptive smoothing we show that the galaxies on the blue side of the CMR often show evidence for dust extinction, which strengthens the interpretation that the bluer colors are due to young stellar populations. We also find that outliers on the red side of the CMR are more compact than expected for their luminosity. We find several of these red outliers in Virgo, often close to more massive galaxies. No red outlying compact early-types are found in Fornax and Coma in this magnitude range while we find three in the Virgo cluster. We show that the CMR of the Fornax and Virgo clusters are slightly bluer than that of Coma. We suggest that the large number of outliers and larger scatter found for the Virgo cluster CMR is a result of Virgos different assembly history.2019A&A...625A..94Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/625/A94CatalogResearchIsServedByTAP VizieR generic servicerelated-toVII/180 : Galaxies in Fornax Cluster & 5 nearby groups (Ferguson+ 1990)J/A+A/296/319 : Fornax cluster early-type galaxies (D'Onofrio+, 1995)J/A+A/463/503 : Early-type dwarf galaxies in Fornax cluster (Mieske+, 2007)J/A+A/620/A165 : Fornax Deep Survey with VST. V. dwarf galaxies (Venhola+ 2018)J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)J/A+A/526/A114 : Kinematic profiles of Virgo early-type galaxies (Toloba+ 2011)J/A+A/538/A69 : Virgo early-type galaxies optical properties (Lieder+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/625/A94https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/625/A94http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/625/A94https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/625/A94https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/625/A94http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/625/A94GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/625/A94/table2Photometric parameters of dEs in FornaxrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFCCName of the object (FCCNNN)meta.id;meta.maincharRe(g)Effective radius in g-bandarcsecphys.angSizefloatRe(z)Effective radius in z-bandarcsecphys.angSizefloatg-z(g-z) color in 1"<r<Remagphot.colorfloate_g-zError of (g-z) colormagstat.errorfloatgMAGAbsolute Magnitude in g filtermagphys.magAbsfloatzMAGAbsolute Magnitude in z filtermagphys.magAbsfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/625/A94/table4Color profiles of dEs in FornaxrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFCCName of the object (FCCNNN)meta.id;meta.maincharCoreRadSize of the blue/red corepcphys.angSizeintXOuterFitAverage excess light in the center (G1)stat.fit.paramfloatXCMRAverage excess light from the CMR (G1)stat.fit.paramfloatSlope? Slope of the fitted linestat.fit.paramfloatnullablee_Slope? Error of Slopestat.errorfloatnullableJ/A+A/625/A94/table5Color profiles of dEs in VirgorecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVCCName of the object (VCCNNNN)meta.id;meta.maincharCoreRad? Size of the blue/red corepcphys.angSizeintnullableXOuterFit? Average excess light in the center (G1)stat.fit.paramfloatnullableXCMRAverage excess light from the CMR (G1)stat.fit.paramfloatSlope? Slope of the fitted linestat.fit.paramfloatnullablee_Slope? Error of Slopestat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar