BESO échelle spectroscopy of solar-type stars at Cerro Armazones

BESO échelle spectroscopy of solar-type stars at Cerro Armazones
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Cerro Armazones 太阳型恒星的 BESO 阶梯光谱

DOI:
10.1111/j.1365-2966.2010.17850.x
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发表时间:
2011
影响因子:
4.8
通讯作者:
O. Stahl
O. Stahl
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
K. Fuhrmann;R. Chini;V. Hoffmeister;R. Lemke;M. Murphy;W. Seifert;O. Stahl

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波鸿阶梯式光谱观测仪 BESO 是一台光纤馈电高分辨率光谱仪,适用于智利阿塔卡马沙漠阿马佐内斯山天文台的 1.5 米六足望远镜。在此,我们报告了 2010 年 4 月对太阳型恒星进行的首次 BESO 观测和模型大气分析。数据的质量首先使用反射太阳光光谱以及标准 G 型亚巨星 70 Vir 进行测试。然后,我们研究了明亮的、被认为是单质的 F 型恒星 ψ Gem,并提出了支持等质量双星的光谱证据。我们还提出了 G 型视觉二元 HR 3430 的第一个复合合成模型,并讨论了将其识别为三重系统的光谱观察结果。我们以另一个三元组作为结论,即著名且非常接近的 α Cen,以及其内部太阳型视觉双星的基本恒星参数。
The Bochum Echelle Spectroscopic Observer BESO is a fibre-fed high-resolution spectrograph for the 1.5-m Hexapod Telescope at the Cerro Armazones Observatory in the Atacama desert in Chile. Here we report on the first BESO observations and model atmosphere analyses of solar-type stars secured in 2010 April. The quality of the data is first tested with a reflected sunlight spectrum as well as the standard G-type subgiant 70 Vir. We then investigate the bright and supposedly single F-type star ξ Gem and present the spectroscopic evidence that instead favours an equal-mass binary. We present also the first composite synthetic modelling of the G-type visual binary HR 3430 and discuss the spectroscopic observations that identify this as a triple system. We conclude with another triple, the famous and very nearby α Cen, and the basic stellar parameters of its inner, solar-type visual binary.