Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..201l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. 201-213. Research supported by the National Optical A
Astronomy and Astrophysics
Astronomy
29
Magellanic Clouds, Star Clusters, Brightness Distribution, Color-Magnitude Diagram, Error Analysis, Mass To Light Ratios, Radial Velocity, Stellar Mass
Scientific paper
The radial velocities of 11 to 37 stars have been measured in each of three rich young star clusters in the LMC: NGC 1866, NGC 2164, and NGC 2214. A thorough analysis of the observational errors and contamination by field stars is presented along with a new method to assign confidence limits to the velocity dispersions. Limits are set to the central densities, total masses, and mass-to-light ratios of the clusters, and the question of whether they have unbound halos is addressed. From the small velocity dispersion and large radial extent of NGC 1866, it is inferred that the cluster is not yet tidally limited by the LMC.
Elson Rebecca A. W.
Fall Michael S.
Freeman Kenneth C.
Lupton Robert H.
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