高振幅δ Scuti变星BE Lyn和DY Peg的周期分析  

Period Change Analysis of the High-amplitude δ Scuti Stars:BE Lyn and DY Peg

作　　者：唐德林[1] 罗志全[1] 周世奇[1] 冯丹丹[1] 刘鹏[1] 

机构地区：[1]西华师范大学物理与空间科学学院,四川南充637009

出　　处：《西华师范大学学报（自然科学版）》2017年第1期97-100,共4页Journal of China West Normal University(Natural Sciences)

基　　金：国家自然科学基金项目(U1331121)

摘　　要：收集了高振幅的δScuti变星BE Lyn和DY Peg的736个光度极大值时刻(其中BE Lyn155个,DY Peg 581个),并用O-C方法分别对其进行周期变化分析。它们的O-C图像显示,周期在减小;DY Peg的O-C残差表现出类似三角函数变化规律,因此可能存在着一颗伴星,于是结合离散的傅里叶函数拟合并计算出这颗伴星的轨道参数。736 light maximums of two High-amplitude δ scuti stars are collected including 155 maximums of BE Lyn and 581 maximums of DY Peg. Its periodic changes are analyzed by the O-C method. The O-C diagrams show that both have a decreasing period,and the residuals of DY Peg has a periodic change similar to that of trigonometric function which is possibly caused by a companion star. Therefore,the orbital parameters of the companion star are computed by the Fourier coefficients.

关 键 词：高振幅的δ Scuti变星 周期变化 O-C方法 BE LYN DY PEG 

分 类 号：P154[天文地球—天文学]