Period changes in four Algol-type binaries: SX Dra, AV Del, CU Peg and DK Peg

	Period changes in four Algol-type binaries: SX Dra, AV Del, CU Peg and DK Peg
	Qian SB(钱声帮)1,2,3
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2002
卷号	282 期号:2 页码:399-409
ISSN号	0004-640X
通讯作者	Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Orbital period changes of four neglected short-period semidetached Algols, SX Dra, AV Del, CU Peg and DK Peg, are presented based on the analysis of their O-C observations. It is found that the three systems, AV Del, CU Peg and DK Peg, show rapid period increase at rates of dP/dt = + 3.15 x 10(-6), + 2.00 x 10(-6) and + 4.88 x 10(-7) days/year respectively. For the other system, SX Dra, a possible periodic variation in the orbital period is discovered to superimpose on a very rapid period increase (dP/dt = + 1.09 x 10(-5) days/year). The period increases of the four Algols can be explained by a mass transfer from the secondary to the more massive primary, which is in agreement with the semi-detached configurations of these systems. However, since the period increases are rather rapid, the mass transfer should be on a dynamical time scale. The cyclic period change in SX Dra suggests that there may exist a third body in this system.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
收录类别	SCI
原文出处	http://link.springer.com/article/10.1023%2FA%3A1020876723842
语种	英语
WOS记录号	WOS:000178929400004
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5762]
专题	云南天文台_双星与变星研究组
作者单位	1.Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011, Kunming, P.R. China 2.National Astronomical Observatories, Chinese Academy of Sciences (NAOCAS) 3.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC)
推荐引用方式 GB/T 7714	Qian SB. Period changes in four Algol-type binaries: SX Dra, AV Del, CU Peg and DK Peg[J]. ASTROPHYSICS AND SPACE SCIENCE,2002,282(2):399-409.
APA	Qian SB.(2002).Period changes in four Algol-type binaries: SX Dra, AV Del, CU Peg and DK Peg.ASTROPHYSICS AND SPACE SCIENCE,282(2),399-409.
MLA	Qian SB."Period changes in four Algol-type binaries: SX Dra, AV Del, CU Peg and DK Peg".ASTROPHYSICS AND SPACE SCIENCE 282.2(2002):399-409.