BESO échelle spectroscopy of solar-type stars at Cerro Armazones
BESO échelle spectroscopy of solar-type stars at Cerro Armazones
复制标题
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
中科院分区:
文献类型:
--
作者:
K. Fuhrmann;R. Chini;V. Hoffmeister;R. Lemke;M. Murphy;W. Seifert;O. Stahl
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.