Abstract
The theoretical and observational methods for the determination of the gravity darkening exponents in contact binaries of W UMa type are briefly presented. Among the theoretical ones, those of von Zeipel, Lucy and Claret are given special attention. The results of observational approaches developed by several investigators are also presented and discussed.
The main points of a new method for the determination of the gravity darkening in W UMa systems are presented. It is based on Kopal’s method of Fourier analysis of the light changes of eclipsing variables in the Frequency Domain. The method is applied to a large enough sample of W UMa systems for which geometric and photometric elements have been derived by the most powerful techniques. The results of the new method confirm the previous ones with the assumed, same geometrical parameters. The derived values are very close to those predicted by the existing theory of radiative transfer or convective equilibrium.
FootNotes
1The present work is dedicated to the memory of Professor Z. Kopal
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Alencar S.H.P., Vaz L.P.R., 1997, A&A 326, 257.
Anderson L., Shu F.H., 1977, ApJ 214, 798.
Baker N., Temesvary S., 1966, Tables of Convective Stellar Envelope Models, 2d ed. New York: NASA, Goddard Inst. for Space Studies.
Bradstreet D.H., 1993, Binary Maker 2.0 User Manual.
Budding E., Kopal Z., 1970, ApSS 9, 343.
Claret A., 1995, A&AS 109, 441.
Claret A., 1998, A&AS 131, 395.
Eaton J.A., Wu C.-C., Rucinski S.M., 1980, ApJ 239, 919.
Hilditch R.W., 1981, MNRAS 196, 305.
Kippenhahn R., Weigert A., Hofmeister E., 1967, in Computational Physics, Academic Press, New York, Vol. 7, p. 129.
Kitamura M., Tanabe H., Nakamura T., 1957, Publ. Astron. Soc. Japan, 9, 120.
Kitamura M., Nakamura Y., 1983, Ann. Tokyo Astron. Obs., 2nd ser. 19, 413.
Kitamura M., Nakamura Y., 1986, Ann. Tokyo Astron. Obs., 2nd ser. 21, 229.
Kitamura M., Nakamura Y., 1987a, Ann. Tokyo Astron. Obs., 2nd ser. 21, 311.
Kitamura M., Nakamura Y., 1987b, Ann. Tokyo Astron. Obs., 2nd ser. 21, 387.
Kitamura M., Nakamura Y., 1988a, ApSS 145, 117.
Kitamura M., Nakamura Y., 1988b, Ann. Tokyo Astron. Obs., 2nd ser. 22, 31.
Kitamura M., Nakamura Y., 1989, Publ. Nat. Astron. Obs. Japan, 1, 43.
Kopal Z., 1968, ApSS 2, 23.
Kopal Z., 1975, ApSS 38, 191.
Kopal Z., 1976, ApSS 45, 269.
Kopal Z., 1977, ApSS 51, 439.
Kopal Z., 1979, Language of the Stars, D. Reidel Publ. Co., Dordrecht and Boston.
Kopal Z., 1986, Vistas in Astronomy, Vol.29, pp. 295.
Kopal Z., Kitamura M., 1968, Adv. in Astron. Astrophys. (Academic Press, New York), 6, 125.
Lucy L.B., 1967, Z. Astrophys. 65, 89.
Pantazis G., Niarchos P.G., 1998, A&A 335, 199.
Popper D., 1984, AJ 89, 132.
Rafert J.B., Twigg L.W., 1980, MNRAS 193, 79.
Rucinski S.M., 1989, Comm. on Astrophys. 14, 79.
Sarna M.J., 1989, A&A 224, 98.
Zeipel H.V., 1924, MNRAS 84, 702.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2000 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Niarchos, P.G. (2000). On the Gravity Darkening of Eclipsing Variables of W UMa Type. In: İbanoğlu, C. (eds) Variable Stars as Essential Astrophysical Tools. NATO Science Series, vol 544. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4299-1_34
Download citation
DOI: https://doi.org/10.1007/978-94-011-4299-1_34
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-6084-1
Online ISBN: 978-94-011-4299-1
eBook Packages: Springer Book Archive