J/A+AS/116/447ivo://CDS.VizieR/J/A+AS/116/447CDSStaneva A.Spassova N.Golev V.1997-12-09T18:06:32Z1997-12-09T19:06:28ZCDS support team

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

cds-question@unistra.frglobular-star-clustersThe projected ellipticities and orientations of 173 globular clusters in the Andromeda galaxy have been determined by using isodensity contours and 2D Gaussian fitting techniques. A number of B plates taken with the 2m Ritchey-Chretien-coude reflector of the Bulgarian National Astronomical Observatory were digitized and processed for each cluster. The derived ellipticities and orientations are presented in the form of a catalogue. The projected ellipticities of M 31 GCs lie between 0.03/0.24 with mean value {epsilon}=0.086+/-0.038. It may be concluded that the most globular clusters in the Andromeda galaxy are quite spherical. The derived orientations do not show a preference with respect to the center of M 31. Some correlations of the ellipticity with other clusters parameters are discussed. The ellipticities determined in this work are compared with those in other Local Group galaxies1996A&AS..116..447Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/116/447CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/116/447https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/116/447http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/116/447https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/116/447https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/116/447http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/116/447GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/116/447/table1Morphological parameters of M31 globularsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameClusters' name from Sargent et al.(1977) or Battistini et al.(1987)meta.id;meta.maincharEpsMean ellipticitysrc.ellipticityfloate_EpsFinal rms uncertainty in ellipticitystat.errorfloatPA[]? Position angle of the major axis measured from north toward eastdegpos.posAnginte_PA[]? Final rms uncertainty in position angledegstat.errorintMesNumber of measurementsmeta.numberintMethodReduction method (I for isodensity analysis and D for 2D Gaussian)meta.notecharaApparent angular size of the major axisarcsecphys.angSize;srcfloatJ/A+AS/116/447/table3Comparison of the ellipticities with the data of other authorsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameClusters' name after Sargent et al. (1977)meta.id;meta.maincharEpsA1Annulus A ellipticity, Davoust & Prugniel (1990)src.ellipticitycharEpsB1Annulus B ellipticity, Davoust & Prugniel (1990)src.ellipticitycharEpsA2Annulus A ellipticity, Lupton (1989)src.ellipticitycharEpsB2Annulus B ellipticity, Lupton (1989)src.ellipticitycharEpsEllipticity from this worksrc.ellipticityfloatRadRadiusarcsecphys.angSize;srcfloatJ/A+AS/116/447/table2Comparison of the ellipticities of globulars in M31, Milky Way Galaxy, and Magellanic CloudsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the galaxymeta.id;meta.maincharEpsMean ellipticitysrc.ellipticityfloate_Epsrms uncertainty in ellipticitystat.errorfloatNobjNumber of objects in the samplemeta.numberintl(Eps)Ellipticity range - lower limitsrc.ellipticityfloatu(Eps)Ellipticity range - upper limitsrc.ellipticityfloatSourceSourcemeta.refchar