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Long-time behavior of orbital periods of some Algol-type eclipsing binaries
Qian SB(钱声帮)1,2,3; Qian, SB
发表期刊ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
2000-11
卷号146期号:3页码:377-384
DOI10.1051/aas:2000276
产权排序第1完成单位
收录类别SCI
关键词Stars : Individuals : Uw Cyg Rx Hya Ak Ser Ac Tau Uw Vir And Vv Vul
摘要Orbital period variations of six semi-detached binaries, UW Cyg, RX Hya, AK Ser, AC Tau, UW Vir and VV Vul, are presented based oil the analysis of their O-C observations. For AK Ser and VV Vul, their orbital periods may show secular increase at rates of dP/dt = +7.94 10(-7) and +3.43 10(-6) days/year. For UW Cyg, its orbital period is revised, and the O-C curve shows a cyclic variation with a period of 49.2 years and an amplitude of 0.(d)0383. For the other three systems, RX Hya. AC Tau and UW Vir, the changes in their orbital periods appear more complex but their. O-C curves can be represented by periodic variations (with periods of 54.3, 29.8 and 45.9 years) superimposed on upward parabolic segments. The components of up-ward curving parabolic variations in nx Hya, ne Tau and UW Vir indicate secular period increase with rates of dP/dt = +1.04 10(-6), +7.11 10(-7) and +1.73 10(-6) days/year respectively. The secular period increase in the five systems, RX Hya, AK Ser, AC Tau, UW Vir and VV Vul, can be explained by mass transfer from the less to the massive components, which is consistent with their semi-detached configurations. The periodic changes of the orbital periods in UW Cyg, RX Hya, AC Tau, UW Vir may be caused by the light-time effects due tu the existence of the third bodies.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0365-0138
URL查看原文
归档日期2000-12-31
WOS记录号WOS:000165383900004
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/114a53/5744
专题双星与变星研究组
通讯作者Qian, SB
作者单位1.Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, PR China
2.National Astronomical Observatories, Chinese Academy of Science (NAOCAS), PR China
3.United Laboratory of Optical Astronomy, Chinese Academy of Science (ULOAC), PR China
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Qian SB,Qian, SB. Long-time behavior of orbital periods of some Algol-type eclipsing binaries[J]. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,2000,146(3):377-384.
APA Qian SB,&Qian, SB.(2000).Long-time behavior of orbital periods of some Algol-type eclipsing binaries.ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,146(3),377-384.
MLA Qian SB,et al."Long-time behavior of orbital periods of some Algol-type eclipsing binaries".ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES 146.3(2000):377-384.
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