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Absolute Proper and Space Motion of the Globular Cluster M2

Published online by Cambridge University Press:  26 July 2016

M. Geffert ,
C. Forner ,
M. Hiesgen  and
A.R. Klemola
M. Geffert
Affiliation:
Observatorium Hoher List, Sternwarte der Universität Bonn, W-5568 Daun, Germany
C. Forner
Affiliation:
Observatorium Hoher List, Sternwarte der Universität Bonn, W-5568 Daun, Germany
M. Hiesgen
Affiliation:
Astronomisches Institut Münster, Wilhelm-Klemme Strasse 10, W-4400 Münster, Germany
A.R. Klemola
Affiliation:
Lick Observatory, Santa Cruz, California 95064

Extract

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Space motions of globular clusters are important for the understanding of the kinematics and chemical evolution of the Milky Way. The greatest problem for the determination of the space motions of the globular clusters arises from the difficulties of getting absolute proper motions. In the past these were determined using classical stellar reference frames, modelling of the non-cluster stars in the field and extragalactic objects in the region of the cluster (see e.g. Cudworth & Hanson 1993; Geffert et al. 1993 for references). However, as shown for M 15 and M 3 (Geffert et al. 1993; Tucholke et al. 1993), the results based on different methods for deriving the absolute proper motions differ by up to yrs. In order to get a more complete view of the differences between the various methods it is therefore very interesting to get absolute proper motions based on all three methods for further objects. We present here the first results of a new proper motion study of the globular cluster M 2.

Type
Part Nine: Galactic Structure
Information
Symposium - International Astronomical Union , Volume 161: Astronomy from Wide-Field Imaging , 1994 , pp. 464 - 466
Copyright
Copyright © Kluwer 1994 

References

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