The ellipticities of the RR Lyrae star systems in globular clusters

Details The ellipticities of the RR Lyrae star systems in globular clusters The ellipticities of the RR Lyrae star systems in globular clusters

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jrasc..71...47i&link_type=abstract

Journal of the Royal Astronomical Society of Canada, vol. 71, Feb. 1977, p. 47-53. Research supported by the National Research

Astronomy and Astrophysics

Astronomy

4

Ellipticity, Giant Stars, Globular Clusters, Star Distribution, Statistical Distributions, Variable Stars, Density Distribution, Pulsars, Stellar Motions, Stellar Spectra

Scientific paper

The ellipticities of the systems of RR Lyrae stars in several globular clusters have been evaluated using a statistical method adapted from stellar kinematics. It is concluded that the RR Lyrae stars are good tracers of the overall forms of the clusters and that Shapley's (1917) result for the distribution of the variables in Omega Cen is probably incorrect. There is tentative evidence that the RR Lyrae star systems are more strongly flattened than the overall stellar population in the clusters and that the distributions of RRc variables are more strongly flattened than the overall variable star systems.

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