Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aj....113..800s&link_type=abstract
Astronomical Journal v.113, p.800
Astronomy and Astrophysics
Astronomy
1
Stars: Individual: Lp Cephei, Binaries: Eclipsing
Scientific paper
As part of our study of eccentric eclipsing binary candidates, we have obtained multiband CCD light curves of LP Cephei formed from observations taken at Kitt Peak National Observatory in 1994 September. The CCDPHOT system was used in conjunction with the 0.9 m Cassegrain reflector telescope and standard Johnson U, B, V, and Cousins R and I filters. Five epochs of minimum light were determined and an improved linear ephemeris was calculated. The first published synthetic light curve solutions of LP Cep are presented. Our analysis reveals that LP Cep is in a near-contact semidetached configuration consisting of an F2 spectral-type primary component with a fillout ˜78% and a K1 secondary filling its Roche lobe. Despite the earlier reports that LP Cep has a displaced secondary eclipse, our light curves show no such effect. The presence of a spot due to a tenuous, intermittent gas stream and star spot activity may be the source of such asymmetries.
Carrigan Brian J.
Gray Jamison D.
McDermith Richard J.
Samec Ronald G.
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