Revised Photometric Elements of the Eclipsing Binary Tw-Draconis

Details Revised Photometric Elements of the Eclipsing Binary Tw-Draconis Revised Photometric Elements of the Eclipsing Binary Tw-Draconis

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..73..389g&link_type=abstract

Astrophysics and Space Science, Volume 73, Issue 2, pp.389-394

Astronomy and Astrophysics

Astrophysics

9

Scientific paper

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.

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