摘要
本文给出了长蛇座FG的新的BV两色光电测光资料.同1962年的光变曲线比较,该星的光变曲线发生了明显的变化,轨道周期也是变化的.使用Wilson-Devinney程序分析新双色光变曲线所得的测光解表明,FG Hya是一个相接程度达90%的A次型WUMa型双星.对19个A次型相接双星的有关参数分析表明,公共包层的相对厚度同过相接程度和质量比的四分之一次方的乘积成正比.
New photoelectric photometric observations of FG Hya in B and V are presented. Comparing with Binnendijk's observations (1962), the new ones suggest that the light curves of FG Hya may change and its orbital period is also changeable. The light curve analyses were carried out by using the Wilson-Devinney code. New photometric solutions reveal that FG Hya is an A-type contact binary, the overcontact degree of which is equal to 90%. On the basis of analyses of 19 A-type contact binaries, the relation between the thickness of the envelope (△r_2) and the overcontact degree(f) and the mass ratio (q) are discussed and the following stati-stical formula has been obtained: △r_2/r_2=0.28fq^(1/4), where r_2 is the relative radius of the secondary component.
出处
《天文学报》
CSCD
北大核心
1991年第3期326-332,共7页
Acta Astronomica Sinica
关键词
食双星
测光解
相接双星
Star—Photometric solutions—Contact binary
