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Influence of a Spiral Gravitational Field on the Observational Determination of Galactic Structure

Published online by Cambridge University Press:  30 March 2016

C. C. Lin ,
C. Yuan  and
W. W. Roberts
C. C. Lin
Affiliation:
Massachusetts Institute of Technology, U.S.A.
C. Yuan
Affiliation:
City College of New York, U.S.A.
W. W. Roberts
Affiliation:
University of Virginia, U.S.A.

Extract

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To investigate the nature and the extent of the influence of a spiral gravitational field on the observational determination of galactic structure, we examine several models of the solar vicinity, including a spiral gravitational field and the accompanying shocks. (These models are described in the Appendix.) We calculate the radial motions and the proper motions that would be observed from the solar vicinity. We then treat these theoretically calculated data by the conventional methods used for analyzing observational data. In this way, we hope to recover the galactic parameters originally adopted in our models. The accuracy of this process is then a measure of the uncertainty in the existing determinations of galactic constants, because of the influence of the spiral gravitational field.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 3: Highlights of Astronomy. As presented at the XVth General Assembly of the IAU, 1973 , 1974 , pp. 441 - 450
Copyright
Copyright © Reidel 1974

References

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