Hostname: page-component-5c6d5d7d68-txr5j Total loading time: 0 Render date: 2024-08-16T12:10:54.727Z Has data issue: false hasContentIssue false
  • English
  • Français

Asteroseismology of δ Scuti Stars: Observations

Published online by Cambridge University Press:  08 February 2017

Michel Breger
Michel Breger*
Affiliation:
Institut für Astronomie, Türkenschanzstr. 17, A-1180 Wien, Austria

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We review recent observational developments which provide important asteroseismological tools. Extensive multisite campaigns of individual δ Scuti stars show that 24 or more pulsation modes with ℓ = 0 to 2 can be detected photometrically. Spectroscopically, also about 30 modes have been detected, and these can be identified with modes of ℓ values up to 20. Since each technique favors the detection of specific types of modes, hundreds or thousands of modes must be excited in δ Scuti stars.

We examine the quantities which can be matched between observations and theoretical models specifically computed for each star. Recent progress in tbe mode identification of multiple pulsation modes is illustrated by presenting an application of the phase shift method for the two stars, FG Vir and 4 CVn, recently measured by the Delta Scuti Network.

Type
VI. Asteroseismology II
Information
Symposium - International Astronomical Union , Volume 185: New Eyes to See Inside the Sun and Stars , 1998 , pp. 323 - 330
Copyright
Copyright © Kluwer 1998 

References

Bedding, T. R., Kjeldsen, H., Reetz, J., Barbuy, B., 1996, MNRAS 280, 1155 Google Scholar
Breger, M., 1990, A&A 240, 308 Google Scholar
Breger, M., Handler, G., Nather, R. E., et al., 1995, A&A 297, 473 Google Scholar
Breger, M., Handler, G., Garrido, R., et al., 1997a, A&A 324, 566 Google Scholar
Breger, M., Zima, W., Handler, G., et al. 1997b, A&A, in press Google Scholar
Dziembowski, W. A., Pamyatnykh, A. A. 1991, A&A 248, L11 Google Scholar
Frandsen, S., Balona, L. A., Viskum, M., et al., 1996, A&A 308, 132 Google Scholar
Garrido, R., Garcia-Lobo, E., Rodriguez, E., 1990, A&A 234, 262 Google Scholar
Handler, G., Pikall, H., O'Donoghue, D., et al., 1997a, MNRAS 286, 303 Google Scholar
Handler, G., Pamyatnykh, A. A., Zima, W., et al., 1997b, MNRAS, in press Google Scholar
Kennelly, E. J., Walker, G. A. H., 1996, PASP 108, 327 Google Scholar
Mantegazza, L. 1997, A&A 323, 844 Google Scholar
Mantegazza, L., Poretti, E., Bossi, M., 1996, A&A 308, 847 Google Scholar
Mathias, P., Aerts, C., 1996, A&A 312, 905 Google Scholar
Michel, E., Belmonte, J. A., Alvarez, M., et al., 1992, A&A 255, 139 Google Scholar
Paparó, M., Sterken, C., Spoon, H. W. W., Birch, P. V., 1996, A&A 315, 400 Google Scholar
Templeton, M., McNamara, B. J., Guzik, J. A., 1997, AJ, in press Google Scholar
Viskum, M. 1997, private communication Google Scholar
Watson, R. D. 1988, ApSS 140, 255 Google Scholar
Winget, D. E., Nather, R. E., Clemens, J. C., et al., 1991, ApJ 378, 326 Google Scholar