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A Search for Short-Term RV Variations in Early-Type Binaries

Published online by Cambridge University Press:  12 April 2016

H. Lehmann ,
G. Scholz  and
G. Hildebrandt
H. Lehmann
Affiliation:
Thüringer Landessternwarte Tautenburg, Germany
G. Scholz
Affiliation:
Astrophysikalisches Institut Potsdam, Germany
G. Hildebrandt
Affiliation:
Astrophysikalisches Institut Potsdam, Germany

Abstract

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We developed a procedure to disentangle the different radial velocity variations due to orbital motion, rotation, and pulsation based on an iterative mutual subtraction of orbital and short-term contributions. The method was successfully tested on a data set of over 2200 spectra of the eclipsing β Cep star EN Lac spanning a time interval of about 90 years. We further applied the procedure to early type binaries. For the A1 III star 21 Her we found short-term variations which indicate the presence of rotationally split nonradial pulsation (NRP) modes.

Type
Part 1.2. Pulsations in Close Binaries
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 88 - 89
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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