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ω Centauri – a Laboratory for Critical Tests of Stellar Structure and Evolution*

Published online by Cambridge University Press:  12 April 2016

L. M. Freyhammer ,
J. O. Petersen  and
M. I. Andersen
L. M. Freyhammer
Affiliation:
University of Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium / Nordic Optical Telescope, Apartado 474, 38700 S/C de La Palma, Spain
J. O. Petersen
Affiliation:
Astronomical Observatory, NBIfAFG, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark
M. I. Andersen
Affiliation:
Department of Physical Sciences, Division of Astronomy, P.O. Box 3000, FIN-90401 Oulu, Finland

Abstract

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Preliminary results are reported for a monitoring program on ω Cen. We search for multi-mode SX Phe stars and changes in pulsation parameters of the cluster variables in order to test models of stellar evolution. With a periodogram for 10,000 light curves, we estimate that ω Cen hosts several hundred SX Phe stars.

Type
Part 3. Cepheids, RR Lyrae Stars, Distance Scales
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 252 - 253
Copyright
Copyright © Astronomical Society of the Pacific 2000

Footnotes

*

Based on observations obtained at the European Southern Observatory at La Silla, Chile

References

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