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Importance of Precise Radial Velocities for Cepheid Binaries

Published online by Cambridge University Press:  12 April 2016

L. Szabados
L. Szabados*
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, XII, Hungary

Abstract

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In view of the high incidence of duplicity among Cepheids, a large number of binary systems remain to be discovered because of the low amplitude of the orbital effect superimposed on the radial velocity variation due to radial pulsation. This fact is shown by simple statistics. The importance of combining astrometric data with radial velocity measurements is also emphasized. Finally the systematics of the radial velocity amplitude as a function of the pulsation period is considered for classical Cepheids.

Type
Part 5. Variable Stars
Information
International Astronomical Union Colloquium , Volume 170: Precise Stellar Radial Velocities , 1999 , pp. 211 - 217
Copyright
Copyright © Astronomical Society of the Pacific 1999

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