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题名: THE THREE-DIMENSIONAL ORBIT AND PHYSICAL PARAMETERS OF 47 OPH
作者: Wang, Xiaoli1, 2; Hummel, Christian A.3; Ren ShuLin(任树林)1; Fu YanNing(傅燕宁)1
刊名: ASTRONOMICAL JOURNAL
出版日期: 2015-03-01
卷号: 149, 期号:3, 页码:110
关键词: astrometry ; binaries: spectroscopic ; stars: fundamental parameters ; stars: individual (47 Oph)
学科分类: 天文和天体物理
DOI: 10.1088/0004-6256/149/3/110
文章类型: Article
英文摘要: Although 47 Oph has been shown to be a binary with a period of similar to 27 days using both spectroscopic and interferometric techniques, only a preliminary orbit has been obtained in the previous work due to the shortage of high precision measurements. Since 1997, new spectroscopic and interferometric measurements have been obtained with much higher precision by the spectrograph of the 2.16 m telescope at Xinglong station and the Navy Precision Optical Interferometer, respectively. Combining all of the measurements, a three-dimensional orbit is obtained with high precision in this work. Thus, the component masses are calculated to be 1.50 +/- 0.06 and 1.34 +/- 0.06 M-circle dot, respectively. The orbital parallax is 32.6 +/- 0.6 mas, which is consistent with the Hipparcos parallax. With the known apparent magnitudes and color indices of the components, the derived luminosities are 7.80 +/- 0.36 and 3.41 +/- 0.25 L-circle dot. The estimated radii of the components are 2.06 +/- 0.07 and 1.36 +/- 0.06 R-circle dot. Finally, the evolutionary status of the components are investigated with the help of a stellar evolution model.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: PROTOTYPE OPTICAL INTERFEROMETER ; MARK-III INTERFEROMETER ; SPECTROSCOPIC BINARIES ; RADIAL-VELOCITIES ; STARS ; PRECISION
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000352304000021
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14871
Appears in Collections:历算和天文参考系研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.European So Observ, D-85748 Garching, Germany
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