An Astrometric Study of the Binary Star α Ophiuchi
An Astrometric Study of the Binary Star α Ophiuchi
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双星蛇夫座 α 的天体测量研究
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
G. Gatewood
中科院分区：
文献类型：
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作者：
G. Gatewood
这里报告的工作结合了来自多通道天体测量光度计（MAP）、欧洲天体测量卫星依巴谷（Hipparcos）和附近亚巨星星星系统α Oph的红外斑点观测的数据。发现A5 IV主星的质量为2.84 ± 0.19 M⊙，而大约K2 V的伴星的质量为0.78 ± 0.058 M⊙。距离模数为0.834 ± 0.024等，得到的绝对视星等为1.248 ± 0.025等，绝对K星等为4.3 ± 0.2等。表格列出了MAP数据和星历表，表明未来4年是进一步干涉测量的理想时期。
The work reported here combines data from the Multichannel Astrometric Photometer (MAP), the European astrometric satellite, Hipparcos, and infrared speckle observations of the nearby subgiant binary star system α Oph. The A5 IV primary is found to have a mass of 2.84 ± 0.19 M⊙, while the approximately K2 V companion has a mass of 0.78 ± 0.058 M⊙. The distance modulus is 0.834 ± 0.024 mag, yielding an absolute visual magnitude of 1.248 ± 0.025 mag and an absolute K magnitude of the secondary of 4.3 ± 0.2 mag. Tables list the MAP data and an ephemeris that indicates that the next 4 yr are ideal for further interferometry.