Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93..678l&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 93, March 1987, p. 678-682.
Astronomy and Astrophysics
Astronomy
3
Eclipsing Binary Stars, Electrophotometry, Light Curve, Main Sequence Stars, Radii, Roche Limit, Stellar Mass, Ubv Spectra
Scientific paper
The photoelectric observations of TX Cet (by Duerbeck and Ammann in 1976) and RR TrA (by Somerville in 1961 - 1963) were reanalyzed with the Wilson and Devinney model. The inclinations were found to be very large, and the eclipses were found to be total and almost total for TX Cet and RR TrA, respectively. The photometric mass ratios are believed to be fairly reliable. Both of the two systems are found to have semidetached configurations with the lower-mass components filling their Roche lobes (regular Algol systems). It is found that TX Cet either does not have a third light at all or the third light is only marginally detectable. Masses and radii of components are estimated. It is suggested that TX Cet may be evolving from an evolved contact configuration, whereas RR TrA is at a stage well after the contact phase, where the mass gainer is now a normal main-sequence star.
Leung Kam-Ching
Li Yan-Feng
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