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Short Period M Giant Stars in the Hipparcos Catalogue

Published online by Cambridge University Press:  12 April 2016

Chris Koen  and
Dave Laney
Chris Koen
Affiliation:
South African Astronomical Observatory, PO Box 9, 7935 Observatory, South Africa
Dave Laney
Affiliation:
South African Astronomical Observatory, PO Box 9, 7935 Observatory, South Africa

Abstract

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A number of M giant stars with periods of the order of a few days were discovered by the Hipparcos mission. Similar stars may also have been found by other large-scale surveys. Parallaxes and colour indices of a sample of these stars were used to estimate their radii, temperatures and luminosities. It is shown that it is very unlikely that they are ellipsoidal or spotted variables, and that they are most likely pulsating in high overtone modes.

Type
Part 2. Variability of High-Luminosity Stars
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 101 - 104
Copyright
Copyright © Astronomical Society of the Pacific 2000

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