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The dynamics of NGC 1866

Published online by Cambridge University Press:  19 July 2016

Phil Fischer ,
D.L. Welch ,
P. Cote ,
M. Mateo  and
Barry F. Madore
Phil Fischer
Affiliation:
Dept. of Physics, McMaster University, Hamilton, ON, L8S 4M1, Canada
D.L. Welch
Affiliation:
Dept. of Physics, McMaster University, Hamilton, ON, L8S 4M1, Canada
P. Cote
Affiliation:
Dept. of Physics, McMaster University, Hamilton, ON, L8S 4M1, Canada
M. Mateo
Affiliation:
Carnegie Inst. of Wash., 813 Santa Barbara St., CA, 91101, USA
Barry F. Madore
Affiliation:
Jet Propulsion Laboratory, M/S 100-22, California Institute of Technology, Pasadena, CA 91125, USA

Abstract

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High-precision radial velocity measurements have been obtained for 62 stars in the young LMC cluster NGC 1866 using the Las Campanas 2.5m with échelle spectrograph. The mass-weighted mean-square velocity dispersion is σ2 = 6.5 ± 1.3 km2 s−2. The mass of the cluster M(r < 20) = 8.1 ± 1.6 × 104M⊙, implying a M/L of 0.20 ± 0.04 in solar units.

Type
Star Formation and Clustering
Information
Symposium - International Astronomical Union , Volume 148: The Magellanic Clouds , 1991 , pp. 200 - 201
Copyright
Copyright © Kluwer 1991