Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-24T06:24:02.005Z Has data issue: false hasContentIssue false
  • English
  • Français

Secondary Bumps in Cepheid Variables

Published online by Cambridge University Press:  25 April 2016

S. C. B. Gascoigne
S. C. B. Gascoigne*
Affiliation:
Mount Stromlo and Siding Spring Observatories, Research School of Physical Sciences, The Australian National University
Get access Rights & Permissions [Opens in a new window]

Extract

The Hertzsprung phenomenon, in which secondary bumps in the light or velocity curves of cepheid variables occur at systematically earlier phases as the period lengthens, has been known for about 50 years. As part of his programme on non-linear computations of cepheid models, Christie has interpreted the effect as a progressive wave which originates near the surface, travels to the core and is reflected back. He found that the phase varied with period in the correct sense, but to make his models fit both the Hertzsprung and period-luminosity relations he had to assign to them masses only about a half of those expected from evolutionary theory. The discrepancy is one of the outstanding problems in the field.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 2 , Issue 1 , July 1971 , pp. 34
Copyright
Copyright © Astronomical Society of Australia 1971

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Christie, R. H., Q.J.R.A.S., 9, 13 (1968).Google Scholar
2 Robertson, J. W., Proc. A.S.A., 2, 24 (1971).Google Scholar
3 Cogan, B. C., Ap. J., 162, 139 (1970).CrossRefGoogle Scholar
4 van Genderen, A. M., Astr. and Astrophys., 7, 244 (1970).Google Scholar
5 Stobie, R. S., M.N.R.A.S., 144, 485 (1969).Google Scholar