Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-26T03:32:25.759Z Has data issue: false hasContentIssue false
  • English
  • Français

A New Possible Resonance for Population II Cepheids

Published online by Cambridge University Press:  12 April 2016

A. N. Cox  and
R. B. Kidman
A. N. Cox
Affiliation:
Theoretical Division, Los Alamos National Laboratory, University of California
R. B. Kidman
Affiliation:
Theoretical Division, Los Alamos National Laboratory, University of California

Extract

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.

Light and velocity curves of some radial mode variable stars seem to indicate a resonance where the second overtone has a period exactly half that of the fundamental mode. The two classes of stars that show this resonance by bumps in their light curves are the classical Cepheids and the population II BL Her variables. We here propose that there is another resonance for the population II W Vir variables where the ratio of the first overtone to the fundamental periods is 0.5.

Type
Part IV. Population II Cepheids
Information
International Astronomical Union Colloquium , Volume 82: Cepheids: Theory and Observations , 1985 , pp. 250 - 253
Copyright
Copyright © Cambridge University Press 1985

References

Buchler, J. R. (1984). Ap. J., in press.Google Scholar
Carson, T. R., Huebner, W. F., Magee, N. H., & Merts, A. L. (1984). Ap. J., (Aug 15).Google Scholar
Cox, A. N., Michaud, G., & Hodson, S. W. (1978). Ap. J., 222, 621.10.1086/156178CrossRefGoogle Scholar
Davis, C. G., Moffett, T. J., & Barnes, T. G. (1981). Ap. J., 246, 914.10.1086/158984CrossRefGoogle Scholar
Hertzsprung, E. (1926). Bull. Astr. Int. Netherlands, 3, 115.Google Scholar
Hodson, S. W., Cox, A. N., & King, D. S. (1982). Ap. J., 253, 260.10.1086/159631CrossRefGoogle Scholar
King, D. S., Cox, A. N., & Hodson, S. W. (1981). Ap. J., 244, 242.10.1086/158701CrossRefGoogle Scholar
Kwee, K. K. (1967). Bull. Astr. Int. Netherlands, 19, 260.Google Scholar
Magee, N. H., Merts, A. L. & Huebner, W. F. (1984). Ap. J., (Aug 15).Google Scholar
Pel, J. W. (1976). Astr. Ap. Suppl., 24, 413.Google Scholar
Simon, N. R. & Schmidt, E. G. (1976). Ap. J., 205, 162.10.1086/154259CrossRefGoogle Scholar
Simon, N. R. (1982). Ap. J., Lett 260, L87.10.1086/183876CrossRefGoogle Scholar
Stellingwerf, R. F. (1975a). Ap. J., 195, 441.10.1086/153343CrossRefGoogle Scholar
Stellingwerf, R. F. (1975b). Ap. J., 199, 705.10.1086/153741CrossRefGoogle Scholar
Stobie, R. S. (1969). M.N.R.A.S., 144, 485.10.1093/mnras/144.4.485CrossRefGoogle Scholar
Stothers, R. (1979). Ap. J., 234, 257.10.1086/157494CrossRefGoogle Scholar
Vemury, S. K. & Stothers, R. (1978). Ap. J., 225, 939.Google Scholar