YNAO OpenIR  > 双星与变星研究组
Alternative TitleObservation and study on over contact
Thesis Advisor钱声帮
Degree Grantor中国科学院研究生院(云南天文台)
Place of Conferral北京
Degree Discipline天体物理
Keyword星团 银河星团 过相接双星 小变幅ew 型过相接双星 变幅分布 测光观测 周期分析 第三天体
Abstract星团中的过相接双星是两子星均充满并溢出各自的洛希瓣且具有对流公共包层的强相互作用双星系统,在研究上比其它场过相接双星系统具更有多的优势。本文对星团及过相接双星的研究现状进行了简要综述,并对银河星团中的过相接双星进行了观测、分析和研究,取得如下结果: 1. 通过对银河星团中过相接双星相关量的统计研究发现,星团中过相接双星的数目与星团年龄成正比,年龄越大的星团中过相接双星频数越大。 2. 对过相接双星变幅分布进行了分析研究。 3. 通过对星团IC2944中的过相接双星BH Cen及NGC6383 中V701 Sco 周期变化进行分析,结果发现BH Cen 的轨道周期在长期增加的基础上还叠加了一个周期性变化。而质量比为单位1的V701 Sco 不存在长期变化,但是它也包含一个周期性变化。这两个系统所存在的周期性振荡,表明它们都存在第三天体。 4. 使用云南天文台1米望远镜对年轻星团M44中过相接双星TX Cnc 进行了五个 晚上的测光观测,并采用WD 程序对该数据进行解轨分析,求出了它的基本物理参量。 5. 使用云南天文台1米望远镜对年老星团M67中的过相接双星AH Cnc 进行了长达几年的连续监测。采用WD 程序对其2001年B、V 波段的数据进行解轨分析。该系统可能存在其它伴星天体。
Other AbstractThe overcontact binary in star clusters is a system whose components both fill their Roche lobe and there is a convective common envelope. It is more predominant than the field star in researching. In this paper, overcontact binaries in open clusters were observed, analyzed and studied. Meanwhile, the observational and theoretical studies for star clusters and overcontact binary are also summarized briefly. The results are obtained as follows: 1. It was found that the number of the overcontact binary in open cluster is in line with the age of cluster. That means the old one has more overcontact binaries. It supports the viewpoint of overcontact binaries was a stage of binaries. 2. The distribution of amplifications about the overcontact binaries were studied. 3. overcontact binary BH Cen and V701 Sco in the extremely young open cluster IC2944 and NGC6383 were analyzed, we found that the period of BH Cen was increasing. And meanwhile, a period of the orbital period oscillation existed. But there was not long-term changes in V701 Sco whose mass ratio is unit except a period oscillation. 4. We used the 1.0-m reflecting telescope at the Yunnan Observatory to observe the overcontact binary TX Cnc which is a member of the young cluster M44 for five nights. The observations obtained on December 18 & 19, 2004 are complete in the V band. Through using the W-D code. We derived its basic parameters. 5. We used the 1.0-m reflecting telescope at the Yunnan Observatory to observe the overcontact binary AH Cnc which is a member of the old cluster M67 for several years. Many data was obtained.. Two cyclic oscillations were discovered to be superposed on a continuous period increase.
Subject Area天文学
Document Type学位论文
Recommended Citation
GB/T 7714
刘亮. 银河星团中过相接双星的观测与研究[D]. 北京. 中国科学院研究生院(云南天文台),2007.
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