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Period changes in four Algol-type binaries: SX Dra, AV Del, CU Peg and DK Peg
Qian SB(钱声帮)1,2,3; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICS AND SPACE SCIENCE
2002
卷号282期号:2页码:399-409
DOI10.1023/A:1020876723842
产权排序第1完成单位
收录类别SCI
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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-640X
URL查看原文
归档日期2003-02-21
WOS记录号WOS:000178929400004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5762
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
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)
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Qian SB,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,&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,et al."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.
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