密近双星的测光研究  

Photometric Study of Close Binary

作　　者：钱声帮[1] 

机构地区：[1]中国科学院云南天文台

出　　处：《云南天文台台刊》1997年第1期87-88,共2页Publications of the Yunnan Observatoty

摘　　要：本文对密近双星中由食、反射效应、引力昏暗效应和临边昏暗效应等引起的标准光变和由子星脉动、黑子、耀斑和热斑等引起的测光畸变以近及相接双星和相接双星光变曲线的不对称性（ＯＣｏｎｎｅｌ）和相接双星光变曲线随时间的变化等进行了详细的综述和讨论。并在前人研究的基础上，综述了密近双星测光解轨研究的两种方法“矫正”光变曲线法和综合光变曲线法。给出了近相接双星ＤＤＭｏｎ的ＢＶ两色光电测光研究。本文用云台１ｍ镜及光电测光系统测得了该双星ＢＶ双色完整光变曲线及三个主极小时刻，结合利用Ｙａｍａｓａｋｉ等人（１９９０）的观测资料计算的四个极小时刻，拟合出了ＤＤＭｏｎ新的历元公式。并由此计算我们观测资料的位相。我们的光变曲线和Ｙａｍａｓａｋｉ等人（１９９０）的相比存在着很大的变化。主极大在Ｂ和Ｖ波段分别要比Ｙａｍａｓａｋｉ等人的暗０．０３ｍａｇ和０．０８ｍａｇ。主极小在Ｂ和Ｖ波段也分别要暗０．０８ｍａｇ和０．１２ｍａｇ。另外，Ｙａｍａｓａｋｉ等人光变曲线上较明显的ＯＣｏｎｎｅｌ效应消失了，位于０．ｐ２５和０．ｐ３６之间的畸变移到了０．ｐ１６和０．ｐ２５之间。我们用Ｗ－Ｄ方法同时分析了我们的观测资料和Ｙａｍａｓａｋｉ等人（１９９０?The present thesis introduces the normal light variation for eclipsing binaries, which is caused by eclipse、 reflection effect、 gravity darkening effect and limb darkening effect, and the disturbance of light curve, which is caused by the pulsation of components、 dark spots and hot spot on the surface of the close binaries, discusses the OConnell effect in near contact and contact binaries and the light curve variation with time in contact binaries, and reviews the analysis methods of light curve-“correction” light curve method and light curve synthesis method. In this thesis, a photometric study of the short-period near contact binary DD Mon has been presented. Complete photometric BV light curves have been obtained with the 1m telescope at Yunnan Observatory, and three new times of light minimum have been determined from our observations. Combing with the four times of light minimum determined from Yamasaki et als (1990) observations, we derived the new ephemeris of DD Mon, which was used to compute the phase of our observations. When comparing Yamasaki et als light curve with our light curve, the maximum brightness of our light curves was fainter by 0.03mag(B) and 0.08mag(V), the minimum brightness was also fainter by 0.08mag(B) and 0.12mag(V), the OConnell effect on our light curves was not found, and the disturbance between 0. p25-0. p36 on their light curve was shifted to 0. p16-0. p25. Yamasaki et als observations and our observations have been analyzed by using W-D method, the conclusion is the following: (1) DD Mon is a near contact binary with the secondary component filling its Roche lobe. (2) Our photometric solutions and Yamasaki et als spectroscopic elements have been combined to obtain the obsolute values for the physical quantities of DD Mon: Mass of the primary M 1=1.05±0.08M ⊙ Mass of the secondary M 2=0.47±0.04M ⊙ Radius of the primary R 1=1.36±0.04R ⊙ Radius of the secondary R 2=1.03±0.03R ⊙ (3) The fainter

关 键 词：密近双星 测光 双星 

分 类 号：P153[天文地球—天文学]