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Galactic Rotation From Young Open Star Clusters

Published online by Cambridge University Press:  14 August 2015

H. M. Maitzen ,
A.F.J. Moffat  and
Th. Schmidt-Kaler
H. M. Maitzen
Affiliation:
Universitäts-Sternwarte Wien
A.F.J. Moffat
Affiliation:
Département de Physique, Université de Montréal
Th. Schmidt-Kaler
Affiliation:
Astronomisches Institut der Ruhr-Universität Bochum

Extract

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The rotation of the Galaxy can best be studied with the aid of tracers for which distance and velocity can be obtained simultaneously, accurately and unambiguously out to large distances. Clearly, the best objects are the very young clusters. The local gradient of the angular velocity is contained in Oort's constant and, due e.g. to perturbations from spiral features, may not reflect the smoothly varying, underlying global component of rotation. Thus, it is necessary to reach out as far as possible in order to allow a smoothing of the rotation curve.

Type
August 27 Introduction, Associations, Galactic Structure
Information
Symposium - International Astronomical Union , Volume 85: Star Clusters , 1980 , pp. 125 - 127
Copyright
Copyright © Reidel 1980 

References

Johnson, H.L., Svolopoulos, S.N.: 1961, Astrophys. J. 134, 868.Google Scholar
Jackson, P.D., Fitzgerald, M.P., and Moffat, A.F.J.: 1979, in Burton, W. B. (ed.). IAU Symposium 84: “The Large Scale Characteristics of the Galaxy,” (in press).Google Scholar