Spectroscopy of giants in LMC clusters. II - Kinematics of the cluster sample

Details Spectroscopy of giants in LMC clusters. II - Kinematics of the cluster sample Spectroscopy of giants in LMC clusters. II - Kinematics of the cluster sample

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103..447s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 103, Feb. 1992, p. 447-459. Research supported by Observatorio Interamericano de Cer

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132

Astronomical Spectroscopy, Giant Stars, Magellanic Clouds, Star Clusters, Galactic Evolution, Galactic Mass, Galactic Structure, Mass To Light Ratios, Stellar Motions

Scientific paper

Velocities for 83 star clusters in the LMC are analyzed, based on individual stellar velocities measured at the Calcium triplet. One-half of the clusters are objects in the outer parts of the LMC which had no previous velocity determinations. Published velocities for intermediate and old clusters are shown to have had systematic errors. These new velocities with various rotation curve analyses of the LMC, and test aspects of the twisted disk model proposed by Freeman et al. (1983). When the transverse motion of the LMC is taken into account, a single rotating disk solution fits the old and intermediate-aged clusters and other tracers (i.e., there is no need for an additional 'tilted disk' system).

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