Three-colours photoelectric observations of W UMa-system BB Pegasi

Details Three-colours photoelectric observations of W UMa-system BB Pegasi Three-colours photoelectric observations of W UMa-system BB Pegasi

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.140..137a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 140, no. 1, Jan. 1988, p. 137-159.

Astronomy and Astrophysics

Astrophysics

7

Eclipsing Binary Stars, Stellar Spectra, Stellar Spectrophotometry, Ubv Spectra, Light Curve, Periodic Variations, Stellar Color

Scientific paper

This paper presents the UBV photoelectric light curves of the eclipsing binary BB Peg obtained on one clear night in August, 1982, and four nights in November, 1984, by a single-beam refrigerated photon-counting photometer attached to the f/18 Cassegrain focus of the 188-cm reflector at the Kottamia Observatory, Egypt. A comparison of these curves with light curves observed previously for this system has indicated that the depth of the primary eclipse could be a variable property, and that the period of the system has increased. The results of observations suggest that the BB Peg system belongs to the W-type of W Ursae Majoris systems.

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