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Velocity Observations of Multiple Mode AGB Variable Stars

Published online by Cambridge University Press:  12 April 2016

T. Lebzelter ,
K.H. Hinkle ,
R.R. Joyce  and
F.C. Fekel
T. Lebzelter
Affiliation:
Institute for Astronomy, Türkenschanzstrasse 17, A1180 Vienna, Austria
K.H. Hinkle
Affiliation:
National Optical Astronomy Observatory, P.O. Box 26732, Tucson, AZ 85726-6732
R.R. Joyce
Affiliation:
National Optical Astronomy Observatory, P.O. Box 26732, Tucson, AZ 85726-6732
F.C. Fekel
Affiliation:
Tennessee State University, Center of Excellence in Information Systems, 330 10th Avenue North, Nashville, TN 37203

Abstract

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Numerous infrared Spectroscopic observations were obtained of eight AGB field M giants that have multiple periods of light variability. For six of the eight giants we found radial-velocity periods that confirm the long-period light variability. Although we consider the possibility that the velocity variations result from orbital motion, we conclude that the long-period velocity changes in most, if not all of our sample stars, likely result from pulsation rather than duplicity.

Type
Part 5. Mass Loss in Pulsating Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 560 - 561
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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