The Visual Orbit of ι Pegasi
The Visual Orbit of ι Pegasi
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ι Pegasi 的视觉轨道
DOI：
10.1086/307030
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
G. Henry
中科院分区：
文献类型：
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作者：
A. Boden;C. Koresko;G. V. van Belle;M. Colavita;P. Dumont;J. Gubler;S. Kulkarni;B. Lane;D. Mobley;M. Shao;J. Wallace;(The Pti Collaboration);G. Henry
我们利用1997年帕洛玛试验台干涉仪获得的干涉能见度数据，确定了光谱双星ιPEGASI的可视轨道。ιPeg是一个双线双星系统，它的最小质量和光谱分类表明有可能发生日食。我们的轨道和组件直径测定并不支持日食假说：这两个组件在交界处的肢体到肢体的距离为0.151±0.069 mAs。高精度的光度观测支持了我们的结论，即ιPeg系统不会日食。由我们的视觉轨道和Fekel&Tomkin的光谱轨道所隐含的物理参数与用其他方法推断的结果符合得很好。特别地，测得该系统的轨道视差为86.9±1.0ma，两组分的质量分别为1.326±0.016和0.819±0.009 M。
We have determined the visual orbit for the spectroscopic binary ι Pegasi with interferometric visibility data obtained by the Palomar Testbed Interferometer in 1997. ι Peg is a double-lined binary system whose minimum masses and spectral typing suggests the possibility of eclipses. Our orbital and component diameter determinations do not favor the eclipse hypothesis: the limb-to-limb separation of the two components is 0.151±0.069 mas at conjunction. Our conclusion that the ι Peg system does not eclipse is supported by high-precision photometric observations. The physical parameters implied by our visual orbit and the spectroscopic orbit of Fekel & Tomkin are in good agreement with those inferred by other means. In particular, the orbital parallax of the system is determined to be 86.9±1.0 mas, and masses of the two components are determined to be 1.326±0.016 and 0.819±0.009 M, respectively.