Abstract
The roAp stars are shown to have frequency variability on time-scales of years. The observations and data analysis techniques which led to this discovery are discussed. Comparison with frequency variability in the sun over the solar cycle is made. There is no accepted explanation for the observed frequency variations. Some speculations are made.
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References
Baliunas S. L., Vaughan A. H., 1985, ARA&A, 23, 379
Breger, M., Pamyatnikh, A. A., 1998. A&A, 332, 958
Heller C. H., Kawaler S. D., 1988, ApJ, 329, L43
Kreidl T. J., Kurtz D. W., Schneider H., van Wyk F., Roberts G., Marang F., Birch P. B., 1994a, MNRAS, 270,115
Kurtz D. W., 1992, MNRAS, 259, 701
Kurtz D. W., Kanaan A., Martinez P., 1993, MNRAS, 260, 343
Kurtz D. W., Martinez P., van Wyk F., Marang F., Roberts G., 1994, MNRAS, 268, 641
Kurtz D. W., Matthews J. M., Martinez P., Seeman J., Cropper M., Clemens J. C., Kreidl T. J., Sterken C., Schneider H., Weiss W. W., Kawaler S. D., Kepler S. O., van der Peet A., Sullivan D. J., and Wood H. J., 1989, MNRAS, 240, 881
Kurtz D. W., Sullivan D. J., Martinez P., Tripe P., 1994b, MNRAS, 270, 674
Kurtz D. W., van Wyk F., Roberts, G., Marang F., Handler, G., Medupe, R., Kilkenny, D., 1997, MNRAS, 287,69
Martinez P., Kurtz D. W., van Wyk, F., 1994, MNRAS, 271, 305
Wilson, O. C., 1978. ApJ, 226, 379
Wolff S. C., 1983, The A-type Stars: Problems and Perspectives, Monograph series on nonthermal phenomena in stellar atmospheres, NASA SP-463
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© 2000 Springer Science+Business Media Dordrecht
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Kurtz, D.W. (2000). Long-Term Monitoring of Cyclic Frequency Variability in roAp Stars. In: İbanoğlu, C. (eds) Variable Stars as Essential Astrophysical Tools. NATO Science Series, vol 544. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4299-1_14
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DOI: https://doi.org/10.1007/978-94-011-4299-1_14
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-6084-1
Online ISBN: 978-94-011-4299-1
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