A Distant Stellar Companion in the υ Andromedae System
A Distant Stellar Companion in the υ Andromedae System
复制标题
υ 仙女座系统中的遥远恒星伴侣
DOI：
10.1086/341554
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Center
中科院分区：
文献类型：
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作者：
P. Lowrance;J. Kirkpatrick;Charles A. Beichman Jet Propulsion Lab;Infrared Processing;A. Center
Upsilon Andromedae 是一颗 F8 V 恒星，已知拥有一个由至少三颗行星围绕其轨道运行的太阳系外系统。在这里，我们报告了该系统的低质量伴星的发现。伴星具有共同的自行运动，预计分离距离约为 750 天文单位，光谱类型为 M4.5 V。这颗恒星对较亮主星径向速度的影响可以忽略不计，但该系统为恒星行星形成理论和了解动力学稳定性提供了一个有趣的测试平台，因为它是多恒星系统中已知的第一个多行星系统。
Upsilon Andromedae is an F8 V star known to have an extrasolar system of at least three planets in orbit around it. Here we report the discovery of a low-mass stellar companion to this system. The companion shares common proper motion, lies at a projected separation of ~750 AU, and has a spectral type of M4.5 V. The effect of this star on the radial velocity of the brighter primary is negligible, but this system provides an interesting test bed for stellar planetary formation theory and understanding dynamical stability since it is the first multiple planetary system known in a multiple stellar system.