Abstract
The photoelectric light curves of TW Dra obtained by Baglow (1952) and by Walter (1978) have been re-analysed by means of Wood's (1972) model in order to obtain accurate photometric elements. Significantly different elements have resulted from the two sets of observations, but more confidence can be given to the elements deduced from Walter's (1978) data. Radii and luminosities have been computed with the aid of Popper's (1978) new values for masses.
TW Dra is confirmed to be a typical sd-system, having a distinctly oversized and overluminous secondary. Interestingly, the primary appears to be slightly more luminous than expected for a Main-Sequences star, in agreement with theoretical predictions for present primaries of massexchange binaries systems.
Similar content being viewed by others
References
Allen, C. W.: 1973,Astrophysical Quantities (3rd edn), The Athlone Press, London.
Beglow, R. L.: 1952,Publ. David Dunlap Obs. 2 (No. 1).
Bolokadze, R. D.: 1956,Perem. Zvezdy 11, 375.
Cester, B., Fedel, B., Giuricin, G., Mardirossian, F. and Pucillo, M.: 1977,Astron. Astrophys. 61, 469.
Flower, P. J.: 1977,Astron. Astrophys. 54, 31.
Grygar, J., Cooper, M. L. and Jurkevich, I.: 1972,Bull. Astron. Inst. Czech. 23, 147.
Horák, T.: 1966,Bull. Astron. Inst. Czech. 17, 272.
Iben, I.: 1967,Ann. Rev. Astron. Astrophys. 5, 571.
Koch, R. H., Plavec, M. and Wood, F. B.: 1970,A Catalogue of Graded Photometric Studies of Close Binaries, University of Pennsylvania, Philadelphia.
Kopal, Z. and Shapley, M. B.: 1956,Jodrell Bank Ann. 1, 141.
Lacy, C. L.: 1979,Astrophys. J. 228, 817.
Lucy, L. B.: 1967,Z. Astrophys. 65, 89.
Pearce, J. A.: 1937,Publ. Am. Astron. Soc. 9, 131.
Plaskett, J. S.: 1919,Publ. Dom. Astrophys. Obs. 1, 137.
Plavec, M. and Kratochvíl, P.: 1964,Bull. Astron. Inst. Czech. 15, 165.
Popper, D. M.: 1978,Bull. Am. Astron. Soc. 10, 608.
Smith, B.: 1949,Astrophys. J. 110, 63.
Ulrich, R. K. and Burger, H. L.: 1976,Astrophys. J. 206, 509.
Walter, K.: 1973,Astrophys. Space Sci. 21, 289.
Walter, K.: 1978,Astron. Astrophys. Suppl. 32, 57.
Wood, D. B.: 1972,A Computer Program for Modeling Non-Spherical Eclipsing Binary Systems, Goddard Space Flight Center, Greenbelt, Maryland, U.S.A.
Wood, D. B.: 1973–1978, WINK Status Report No. 1-9, private communication.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Giuricin, G., Mardirossian, F. & Predolin, F. Revised photometric elements of the eclipsing binary TW Dra. Astrophys Space Sci 73, 389–394 (1980). https://doi.org/10.1007/BF00642417
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00642417