Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-26T03:06:27.723Z Has data issue: false hasContentIssue false
  • English
  • Français

Pulsation Modes in Mira and Semiregular Variables

Published online by Cambridge University Press:  25 May 2016

Michael Feast
Michael Feast*
Affiliation:
Department of Astronomy, University of Cape Town, Rondebosch, 7700, South Africa

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.

The most direct evidence for the pulsation mode of Mira and SR variables comes from the linear diameters derived from individual parallaxes and angular diameters, together with the observed periods. The data now available strongly suggest that most, if not all, Miras and SRs pulsate in the same mode. If comparison is made with conventional models, this mode is the first overtone. Uncertainties in deriving the pulsational radius of a Mira from the observations do not appear significant enough to affect this conclusion. Evidence from SRs and Miras in globular clusters supports this conclusion and shows that the pulsation mode does not depend on metallicity. Analysis of light curves leads to broadly the same conclusions, if less directly. The light curves indicate that periodicities other than the main one may also be present and that mode switching may occur in some stars.

Type
Part 2. Pulsation, Mass Loss, Cool Envelopes
Information
Symposium - International Astronomical Union , Volume 191: Asymptotic Giant Branch Stars , 1999 , pp. 108 - 116
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Barthès, D., Mattei, J.A., 1997, AJ 113, 373 Google Scholar
Barthès, D., Tuchman, Y., 1994, A&A 289, 429 Google Scholar
Bedding, T.R., Zijlstra, A.A., von der Lühe, O., Robertson, J.R., Marson, R.G., Barton, J.R., Carter, B.S., 1997, MNRAS 286, 957 Google Scholar
Bedding, T.R., Zijlstra, A.A., 1998, ApJ 506, L47 Google Scholar
Bedding, T.R., Zijlstra, A.A., Jones, A., Foster, G., 1998, MNRAS 301, 1073 CrossRefGoogle Scholar
Bessell, M.S., Scholz, M., Wood, P.R, 1996, A&A 307, 481 Google Scholar
Feast, M.W., 1996, MNRAS 278, 11 Google Scholar
Feast, M.W., Woolley, R., Yilmaz, N., 1972, MNRAS 158, 23 Google Scholar
Fox, M.W., Wood, P.R., 1982, ApJ 259, 198 Google Scholar
Gatewood, G., 1992, PASP 104, 23 Google Scholar
Haniff, C., 1995, in Astrophysical Applications of Stellar Pulsation, Stobie, R.S. & Whitelock, P.A. (eds.), ASP Conf. Ser. 83, p. 270.Google Scholar
Haniff, C.A., Scholz, M., Tuthill, P.G., 1995, MNRAS 276, 640 Google Scholar
Lattanzi, M.G., Munari, U., Whitelock, P.A., Feast, M.W., 1997, ApJ 485, 328 Google Scholar
Mantegazza, L., 1996, A&A 315, 481 Google Scholar
Percy, J.R., Desjardins, A., 1996, PASP 108, 847 Google Scholar
Robertson, B.S.C., Feast, M.W., 1981, MNRAS 196, 111 Google Scholar
Szatmáry, K., Gál, J., Kiss, L.L., 1996, A&A 308, 791 Google Scholar
Tuthill, P.G., Haniff, C.A., Baldwin, J.E., Feast, M.W., 1994, MNRAS 266, 745 Google Scholar
Tuthill, P.G., Haniff, C.A., Baldwin, J.E., 1995, MNRAS 277, 1541 Google Scholar
van Belle, G.T., Dyck, H.M, Benson, J.A., Lacasse, M.G., 1996, AJ 112, 2147 Google Scholar
van Belle, G.T., Dyck, H.M., Thompson, R.R., Benson, J.A., Kannappan, S.J., 1997, AJ 114, 2150 Google Scholar
van Leeuwen, F., Feast, M.W., Whitelock, P.A., Yudin, B., 1997, MNRAS 287, 955 Google Scholar
Whitelock, P.A., 1986, MNRAS 219, 525 Google Scholar
Whitelock, P.A., et al., 1998, in preparation Google Scholar
Wood, P.R., 1990, in From Miras to Planetary Nebulae: Which Path for Stellar Evolution ?, Mennessier, M.O. & Omont, A. (eds.), Editions Frontières, Gif-sur-Yvette, p. 67 Google Scholar
Wood, P.R., Sebo, K.M., 1996, MNRAS 282, 958 Google Scholar