M31 globulars clusters ellipticities (Staneva+, 1996)

Details M31 globulars clusters ellipticities (Staneva+, 1996) M31 globulars clusters ellipticities (Staneva+, 1996)

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat..41160447s&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/116/447. Originally published in: 1996A&AS..116..447S

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Clusters: Globular

Scientific paper

The 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 ɛ=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 galaxies (3 data files).

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