VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems

dc.creatorBassino, Lilia Patricia
dc.creatorRichtler, Tom
dc.creatorDirsch, Boris
dc.date2008
dc.date2019-10-28T14:01:41Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/84167
dc.identifierissn:0035-8711
dc.descriptionWe present a deep Very Large Telescope (VLT) photometry in the regions surrounding the two dominant galaxies of the Antlia cluster, the giant ellipticals NGC 3258 and NGC 3268. We construct the luminosity functions of their globular cluster systems (GCSs) and determine their distances through the turn-over magnitudes. These distances are in good agreement with those obtained by the SBF method. There is some, but not conclusive, evidence that the distance to NGC 3268 is larger by several Mpc. The GCSs colour distributions are bimodal but the brightest globular clusters (GCs) show a unimodal distribution with an intermediate colour peak. The radial distributions of both GCSs are well fitted by de Vaucouleurs laws up to 5 arcmin. Red GCs present a steeper radial density profile than the blue GCs, and follow closely the galaxies' brightness profiles. Total GC populations are estimated to be about 6000 ± 150 GCs in NGC 3258 and NGC 4750 ± 150 GCs in NGC 3268. We discuss the possible existence of GCs in a field located between the two giant galaxies (intracluster GCs). Their luminosity functions and number densities are consistent with the two GCSs overlapping in projection.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.descriptionInstituto de Astrofísica de La Plata
dc.formatapplication/pdf
dc.format1145-1156
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Astronómicas
dc.subjectGalaxies: clusters: general
dc.subjectGalaxies: elliptical and lenticular, cD
dc.subjectGalaxies: individual: NGC 3258
dc.subjectGalaxies: individual: NGC 3268
dc.subjectGalaxies: photometry
dc.subjectGalaxies: star clusters
dc.titleVLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
dc.typeArticulo
dc.typeArticulo


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