A strange phenomenon in XZ Andromedae: two Keplerian periods with a 1:3 ratio

• 作 者: Jin-Zhao Yuan Sheng-Bang Qian
• 机 构: DepartmentofPhysics,YunnanObservatories
• 出 处: 天文和天体物理学研究:英文版
• 发表日期: 2019年9期
• 关键词: binaries:close stars:individual:XZ Andromedae
• 基金项目: supported by the National Natural Science Foundation of China(Nos.11705111 and U1231121).

Six mid-eclipse times of the eclipsing binary XZ And are obtained, which are analyzed together with others collected from the literature. Two sets of cyclic variations with periods of 33.43 and 100.4 yr are found if a double-Keplerian model is used to fit