Study on the period changes of XY Leonis

NTSC-IR

	Study on the period changes of XY Leonis
	Pan, LD ; Cao, M
	1998
发表期刊	ASTROPHYSICS AND SPACE SCIENCE
ISSN	0004-640X
卷号	259 期号:3 页码:285-293
摘要	XY Leo (BD+18 degrees 2307, p = 0(d).28) was observed each season from 1992 through 1995 at Yunnan Observatory with the 1 m telescope and 37 new heliocentric times of minimum light were determined. The newly expanded database of the minimum times,including these new epochs, definitely confirm the sine-like variation of its O-C values. Observations and analyses strongly supported the viewpoint that the variation of the O-C values of the minimum times is mainly caused by the light-time effect. Based on this newly expanded database, new light elements for the eclipsing system XY Leo and new light-time orbit for this complex system have been obtained with much better accuracy than before by means of the least squares fitting to the light-time equation. It's also noted that the additional period variation for XY Leo probably may not be ruled out besides the light-time effect. The method of analysis and the discussion of the results are presented in this paper.
关键词[WOS]	BINARY-SYSTEMS ; CONTACT
语种	英语
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000078776700005
出版者	KLUWER ACADEMIC PUBL
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/10959
专题	中国科学院国家授时中心
通讯作者	Pan, LD
作者单位	1.Chinese Acad Sci, Joint Lab Opt Astron, Lintong 710600, Shaanxi, Peoples R China 2.Chinese Acad Sci, Shaanxi Astron Observ, Lintong 710600, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Pan, LD,Cao, M. Study on the period changes of XY Leonis[J]. ASTROPHYSICS AND SPACE SCIENCE,1998,259(3):285-293.
APA	Pan, LD,&Cao, M.(1998).Study on the period changes of XY Leonis.ASTROPHYSICS AND SPACE SCIENCE,259(3),285-293.
MLA	Pan, LD,et al."Study on the period changes of XY Leonis".ASTROPHYSICS AND SPACE SCIENCE 259.3(1998):285-293.