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Radial velocities with CORAVEL: results on stellar variability and duplicity

Published online by Cambridge University Press:  04 August 2017

G. Burki  and
M. Mayor
G. Burki
Affiliation:
Geneva Observatory 1290 Sauverny, Switzerland
M. Mayor
Affiliation:
Geneva Observatory 1290 Sauverny, Switzerland

Abstract

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The complete radial velocity curve has been determined with CORAVEL for many pulsating stars of various classes: cepheid stars in the Galaxy and in the Magellanic Clouds, RR Lyrae, δ Scuti and SX Phoenicis stars. These measurements allow the determination of the radius variation and of the surface acceleration of these stars. In addition, the mean stellar radius of many of these stars has been determined by applying the Baade-Wesselink method.

Systematic surveys of definite groups of binary or multiple stars are in progress with CORAVEL in order to determine the distribution functions of the orbital parameters. The eccentricity distributions for the binaries in the open clusters Pleiades, Praesepe, Coma Ber and Hyades are presented and their dependence on the physical processes (star formation mechanisms, mass exchange, tidal circularization, dynamical evolution) is briefly discussed.

Type
III. Spectroscopic Research Programmes
Information
Symposium - International Astronomical Union , Volume 118: Instrumentation and Research Programmes for Small Telescopes , 1986 , pp. 385 - 400
Copyright
Copyright © Reidel 1986 

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