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Yong-Po Tian, Fu-Yuan Xiang, Xia Tao, On the Period Variations of BH Virginis, Publications of the Astronomical Society of Japan, Volume 60, Issue 3, 25 June 2008, Pages 571–575, https://doi.org/10.1093/pasj/60.3.571
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Abstract
In the present work, 17 new times of the light minimum for BH Vir were derived from observations by Kjurkchieva et al. (2004 , A&A, 424, 993). Combining the new determined eclipse times with others compiled from the literature, the behavior of their |$O – C$| variation was investigated. It has been found that the orbital period of BH Vir shows some cyclic variations with three different periods: a long-period variation of 51.7 years, and two short-period variations of 9.2 years and 11.8 years, respectively. The mechanisms that could explain the period changes of the system are discussed.