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Optical Spectroscopic Monitoring of the Carbon-Rich Post-AGB Star HD 56126: Pulsation and Shock Waves

Published online by Cambridge University Press:  25 May 2016

Agnès Lèbre ,
Nicolas Mauron ,
Denis Gillet  and
Dominique Barthès
Agnès Lèbre
Affiliation:
GRAAL, Université de Montpellier, 34095 Montpellier cedex 5, France
Nicolas Mauron
Affiliation:
GRAAL, Université de Montpellier, 34095 Montpellier cedex 5, France
Denis Gillet
Affiliation:
Observatoire de Haute Provence, 04870 Saint Michel l'Observatoire, France
Dominique Barthès
Affiliation:
GRAAL, Université de Montpellier, 34095 Montpellier cedex 5, France

Abstract

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A spectroscopic monitoring of the post-AGB star HD 56126 was performed as regularly as possible over a 14-month interval in order to study atmospheric motions that could be associated with shock wave propagation through the stellar atmosphere. Some spectral features are strongly variable on a timescale of a few days. Radial velocity variations are also good evidence for complex atmospheric dynamics, in agreement with the recently found photometric variability. The data point to a pulsating nature for HD 56126, with a main period of 27.3 days.

Type
Session V — Post-AGB Stars
Information
Symposium - International Astronomical Union , Volume 177: The Carbon Star Phenomenon , 2000 , pp. 237 - 244
Copyright
Copyright © Kluwer 2000 

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