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Observations and Orbital Analysis of the High-Amplitude Delta Scuti Star SZ Lyncis: The Unusual Orbital Precession
Li LJ(李临甲)1,2,3; Qian SB(钱声帮)1,2,3; Li, LJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2013-12-25
卷号65期号:6
DOI10.1093/pasj/65.6.116
产权排序第1完成单位
收录类别SCI
关键词Stars: Variables: Delta Scuti Stars: Individual: Sz Lyncis Techniques: Photometric
摘要We determined forty-two new times of light maximum from our photometry observations and WASP project, and collected all times of light maximum observed between 1961 and 2013 in order to calculate the orbital elements of the SZ Lyncis system and the secular change of the pulsation period with the classical O - C method. We confirmed the decrease of the longitude of the periastron passage with a rate of (-1 degrees.15 +/- 0 degrees.25) yr(-1), and discussed the causative mechanism. The results show that the precession of the star's orbit might be due to a close binary system, which means that the companion of SZ Lyncis is actually a binary system. We used the Hipparcos Intermediate Astrometric Data to obtain the complete orbital elements of the SZ Lyncis system, and found that the inclination, i, and parallax, pi(t), are 39 degrees.5 +/- 17 degrees.7 and 2.61 +/- 0.98 mas (corresponds to 380 +/- 140 pc), respectively. We reanalyzed the mean radial velocities of SZ Lyncis given by Bardin and Imbert (1984), and noticed a weak variation existing in the residuals from a single-Keplerian fit. We suggest that more detailed high-precision spectroscopic observations are definitely needed in the future to check this short periodic change.
项目资助者Chinese Natural Science Foundation [11133007]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2014-10-13
WOS记录号WOS:000336823800005
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]INTERMEDIATE ASTROMETRIC DATA ; APSIDAL MOTION TEST ; SPECTROSCOPIC BINARIES ; PHOTOMETRIC PROPERTIES ; STELLAR STRUCTURE ; NU-OCTANTIS ; PERIOD ; CATALOG ; SYSTEMS ; ORI
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5872
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Li, LJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences,P.O. Box 110, 650011 Kunming, P. R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences,P.O. Box 110, 650011 Kunming, P. R. China
3.Graduate University of Chinese Academy of Sciences, 100049, Beijing, P. R. China Yuquan Road 19#, SijingShan Block, 100049, Beijing City, P. R. China
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Li LJ,Qian SB,Li, LJ . Observations and Orbital Analysis of the High-Amplitude Delta Scuti Star SZ Lyncis: The Unusual Orbital Precession[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2013,65(6).
APA Li LJ,Qian SB,&Li, LJ .(2013).Observations and Orbital Analysis of the High-Amplitude Delta Scuti Star SZ Lyncis: The Unusual Orbital Precession.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,65(6).
MLA Li LJ,et al."Observations and Orbital Analysis of the High-Amplitude Delta Scuti Star SZ Lyncis: The Unusual Orbital Precession".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 65.6(2013).
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