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Oscillation Patterns of SX Phœnicis Variables in Globular Clusters

Published online by Cambridge University Press:  12 April 2016

J. O. Petersen ,
M. Quaade ,
M. I. Andersen  and
L. M. Freyhammer
J. O. Petersen
Affiliation:
Niels Bohr Institute for Astronomy, Physics and Geophysics, Astronomical Observatory, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark
M. Quaade
Affiliation:
Niels Bohr Institute for Astronomy, Physics and Geophysics, Astronomical Observatory, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark
M. I. Andersen
Affiliation:
Division of Astronomy, University of Oulu, P.O. Box 3000, FIN-90401 Oulu, Finland
L. M. Freyhammer
Affiliation:
University of Brussels, Pleinlaan 2, B-1050 Brussels, Belgium and Nordic Optical Telescope, Apartado 474, E-38700 Santa Cruz de La Palma, Spain

Abstract

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Based on new analyses of light curves of SX Phœnicis variables in globular clusters and on results taken from the literature, an overview of oscillation patterns in this subgroup of δ Scuti variables is given. Belonging to the Blue Straggler stars, they are expected to have a more complicated life history than “normal” δ Scuti stars in the field or in open clusters. The overall picture is that the patterns found in this SX Phe group seem to be similar to the patterns that are well established for standard field δ Set stars.

Type
Part 6. Variables Close to the Main Sequence
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 497 - 498
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Petersen, J.O., Quaade, M., Freyhammer, L.M., & Andersen, M.I. 2000, in ASP Conf. Ser., 6th Vienna Workshop in Astrophysics: ´ Scuti and Related Stars, ed. Breger, M. & Montgomery, M. (San Francisco: ASP), in pressGoogle Scholar