Four color uvby photometry of near-contact semi-detached system TX cassiopeiae

Details Four color uvby photometry of near-contact semi-detached system TX cassiopeiae Four color uvby photometry of near-contact semi-detached system TX cassiopeiae

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988cha%26a..12...60z&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 12, Issue 1, p. 60-69.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

The early-type eclipsing binary TX Cas was observed in the Strömgen uvby system from 1984 Octover to 1985 January. A total of 343 pairs of b and y observations, of which 126 include also u and v observations, were obtained covering the whole orbital phase with a new determination of period of 2.9268352 d. The colors at maximum light were v = 9.15, b-y = 0.33, m1 = -0.02, c1 = 0.27, and u-b = 0.90, and the reddening E(b-y) = 0.43.
Using the 1983 edition of the Wilson-Devinney program, the v, b, and y light curves were analysed simultaneously. This revealed TX Cas to be a near-contact, semi-detached system, with the less massive component filling it Roche lobe and the more massive component nearly so. The photometric mass ratio was found to be q = m2/m1 = 0.304 and the temperatures T1 = 24 500 °K and T2 = 14 770 °K. TX Cas probably consists of two early-type stars of spectral types B1.5 and B7. The system may be just past the common envelope evolutionary stage of Case B mass transfer.

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