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Maintenance and densification: current proper-motion catalogs

Published online by Cambridge University Press:  01 October 2007

T. M. Girard
T. M. Girard*
Affiliation:
Department of Astronomy, Yale University, P.O. Box 208101, New Haven, Connecticut, 06520-8101, USA email: [email protected]
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Abstract

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An overview of currently available, large-area, proper-motion catalogs is presented. These include the well-known catalogs based on historical Schmidt-telescope surveys as well as other projects that make use of observational material the primary purpose of which, from inception, was the determination of proper motions. The various catalogs are characterized and compared, with an emphasis on their limitations and their appropriateness for various astrophysical uses.

In addition to allowing for the maintenance of a practical celestial reference system, absolute proper-motion surveys provide the raw material from which a better understanding of our Galaxy's structure and kinematics can be built. Several examples will be cited in which large proper-motion surveys are used to probe and describe the distinct stellar components that comprise our Milky Way Galaxy.

Keywords

catalogsastrometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 303 - 309
Copyright
Copyright © International Astronomical Union 2008

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