Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-05T09:03:01.496Z Has data issue: false hasContentIssue false

Photometric Evidence of Instability in Eclipsing Systems

Published online by Cambridge University Press:  14 August 2015

Frank Bradshaw Wood*
Affiliation:
Flower and Cook Observatories, Philadelphia, Pennsylvania, U.S.A.

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.

Many eclipsing variables exhibit characteristics that indicate lack of stability. Physically, these systems range from certain short-period dwarfs, which show irregular brightness fluctuations unexplainable by any normal eclipse hypothesis, to systems such as AO Cassiopeiae: class O super-giants whose periods, velocity curves, and light curves have shown remarkable variations. Included are systems having one Wolf-Rayet component and probably one old nova. Many eclipsing binaries show erratic changes of period that are difficult to explain on any concept of a stable system. Indeed, when we consider the physical conditions which must prevail when two stars are located with their surfaces only a few hundred thousand miles from each other, perhaps we should be surprised that the irregularities are not larger.

Type
V. Phenomena of Instability in Binary Systems
Copyright
Copyright © Cambridge University Press 1957 

References

1. Pickering, E. C., Harv. Ann. 46, 172 (1904).Google Scholar
2. Wendell, O. C., Harv. Ann. 69, 66 (1909).Google Scholar
3. Dugan, R. S., Princeton Contr. No. 6, 59 (1924).Google Scholar
4. Jordan, F. C., Allegheny Publ. 3, 49 (1916).Google Scholar
5. Hardie, R. H., Ap.J. 112, 542 (1950).Google Scholar
6. Sitterly, B. W., A.J. 48, 190 (1940).Google Scholar
7. Struve, O. and Smith, B., Ap.J. 111, 27 (1950).CrossRefGoogle Scholar
8. Wood, F. B., Ap.J. 112, 196 (1950).CrossRefGoogle Scholar
9. Wood, F. B., Princeton Contr. No. 21, 31 (1946).Google Scholar
10. Wood, F. B., Princeton Contr. No. 21, 46 (1946).Google Scholar
11. Detre, L., A.N. 249, 213 (1933).Google Scholar
12. Pierce, N. L., Princeton Contr. No. 18, 3 (1938).Google Scholar
13. Nelson, B., A.J. 56, 136 (1951).Google Scholar
14. Publ. A.S.P. 62, 40 (1950).Google Scholar
15. Hiltner, W. A., Ap.J. 118, 262 (1953).Google Scholar
16. Woods, I. E. and Shapley, M. B., Harv. Bull. No. 854, 6 (1928).Google Scholar
17. Wyse, A. B., Lick Obs. Bull. 17 (No. 464), 37 (1934).Google Scholar
18. Gaposchkin, S., Ap.J. 105, 258 (1947).Google Scholar
19. Struve, O., Ap.J. 106, 255 (1947).Google Scholar
20. Wood, F. B., A.J. 55, 187 (1950).Google Scholar
21. Hiltner, W. A., Struve, O. and Jose, P. D., Ap.J. 112, 504 (1950).Google Scholar
22. Whitney, B. S., Publ. A.S.P. 68, 253 (1956).Google Scholar
23. Lenouvel, F. and Daguillon, J., Ann. d'Ap. 17, 416 (1954).Google Scholar
24. Kron, G. E., Publ. A.S.P. 53, 261 (1947).Google Scholar
25. Struve, O., Publ. A.S.P. 64, 20 (1952).Google Scholar
26. Wood, F. B., Ap.J. 108, 28 (1948).Google Scholar
27. Hiltner, W. A., Ap.J. 110, 443 (1949).Google Scholar
28. Struve, O. and Horak, H. G., Ap.J. 110, 447 (1949).Google Scholar
29. Wood, F. B., A.J. 56, 53 (1951).Google Scholar
30. Binnendijk, L., A.J. 60, 355 (1955).CrossRefGoogle Scholar
31. Kron, G. E., Ap.J. 115, 301 (1952).Google Scholar
32. Linnell, A. P., Harv. Circ. No. 455 (1950).Google Scholar
33. Walker, M. F. and Herbig, G. H., Ap.J. 120, 278 (1954).Google Scholar
34. Johnson, H. L., Perkins, B. and Hiltner, W. A., Ap.J. Suppl. 1 (No. 4), 91 (1954).Google Scholar
35. Walker, M. F., Publ. A.S.P. 66, 230 (1954).CrossRefGoogle Scholar
36. Huffer, C. M., Ap.J. 76, 1 (1932).Google Scholar
37. Roach, F. E. and Wood, F. B., Ann. d'Ap. 15, 21 (1952).Google Scholar
38. Fracastoro, M. G., Arcetri Oss. e Mem. No. 63, 83 (1945); Harv. Circ. No. 456 (1951).Google Scholar
39. Welsh, H. L., J. Roy. Astr. Soc. Canada, 43, 217 (1950).Google Scholar
40. Cousins, A. W. J. and Feast, M. W., Observatory, 74, 88 (1954).Google Scholar