Variability Study of the SX Phoenicis Star BL Camelopardalis

Details Variability Study of the SX Phoenicis Star BL Camelopardalis Variability Study of the SX Phoenicis Star BL Camelopardalis

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008chjaa...8..237f&link_type=abstract

Chinese Journal of Astronomy and Astrophysics, Volume 8, Issue 2, pp. 237-244 (2008).

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

New time-series photometric observations of BL Cam in the V band and white light were made during 2005 to 2007 at the Xinglong Station of China. The frequency analysis confirms two closely separated frequencies, 25.181 d-1 and 25.571 d-1, but the frequency of 31-32 d-1 reported in the literature was not detected in the new data. New times of maximum light were determined from both our light curves and those available on Internet, allowing a more comprehensive study of the O-C diagram, together with the times of maximum light in the literature. A new interpretation, including the period increasing before 1988 and decreasing since 1992 of BL Cam and the light-time effect in a binary system, looks plausible.

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