Revised Photometric Elements of the Eclipsing Binary Di-Pegasi

Details Revised Photometric Elements of the Eclipsing Binary Di-Pegasi Revised Photometric Elements of the Eclipsing Binary Di-Pegasi

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....91..254m&link_type=abstract

Astronomy and Astrophysics, Vol. 91, P. 254, 1980

Astronomy and Astrophysics

Astrophysics

4

Scientific paper

Using Wood's (1972) model we have analyzed Binnendijk's (1973) two-colour photoelectric observations - as yet unsolved - of the eclipsing binary DI Peg and the photoelectric lightcurves published by Rucin'ski (1967). Our photoelectric elements, though still in favour of a semidetached configuration considerably differ from Ruciński's previous solution. The F4 primary is accompanied by a fainter and smaller (probably late G) cooler star, which fills its Roche lobe for our photometric mass ratio q = 0.3. The absolute elements of DI Peg, tentatively estimated by assuming for the primary a mass of 1.4 Msun, reveal that the secondary appears to be clearly undermassive for its temperature, size and luminosity, like common mass-exchange cooler remnants of Algol-type binaries.

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