CCD photometry of W UMa-type contact binaries in the old open cluster Berkeley 39

• 作 者: Yellapragada Ravi Kiron Kandul
• 机 构: DepartmentofAstronomy,KoreaAstronomyandSpaceScienceInstitute
• 出 处: 天文和天体物理学研究：英文版
• 发表日期: 2011年12期
• 关键词: 疏散星团 CCD测光 大学 二进制 英属维尔京群岛 A型 UM 光变曲线 binaries -- eclipsing： contact： W UMa stars
• 基金项目: Acknowledgements We thank the Director of IUCAA for allotting the observing time on the 2.0 m telescope. The authors acknowledge the anonymous referees for their useful comments.

We present the combined BVI multicolor photometric solutions of seven EW variables in the old open cluster Berkeley 39.The observations were carried out in the B and V passbands from the 2 m telescope at the IUCAA-Girawali Observatory in India.The analysi