Recent work on Cepheid variables
Recent work on Cepheids is reviewed in the areas of (1) the large-amplitude mode behavior, (2) convection, and (3) Cepheid masses. Initial-value type nonlinear calculations have not yet yielded true double-mode behavior, but the beginnings of a theory of modal selection are formulated. Recent observ...
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| Veröffentlicht in: | Space science reviews 1980-11, Vol.27 (3-4), p.389-398 |
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| container_end_page | 398 |
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| container_issue | 3-4 |
| container_start_page | 389 |
| container_title | Space science reviews |
| container_volume | 27 |
| creator | Cox, J.P. |
| description | Recent work on Cepheids is reviewed in the areas of (1) the large-amplitude mode behavior, (2) convection, and (3) Cepheid masses. Initial-value type nonlinear calculations have not yet yielded true double-mode behavior, but the beginnings of a theory of modal selection are formulated. Recent observational results have led to increased values of the 'pulsation mass', so that this mass is now in agreement with the evolution theory; the 'Wesselink mass' is also satisfactory. The proposal of helium enrichment in the outer stellar layers should satisfactorily resolve the beat (and perhaps also the bump) mass anomaly. A suggestion that part of the pressure in the envelope is due to a tangled magnetic field resolves the mass anomaly about as well as the helium-enrichment hypothesis. |
| doi_str_mv | 10.1007/BF00168325 |
| format | Article |
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| identifier | ISSN: 0038-6308 |
| ispartof | Space science reviews, 1980-11, Vol.27 (3-4), p.389-398 |
| issn | 0038-6308 1572-9672 |
| language | eng |
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| source | EZB Electronic Journals Library; SpringerLink Journals - AutoHoldings |
| title | Recent work on Cepheid variables |
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