1. BESO échelle spectroscopy of solar-type stars at Cerro Armazones.
- Author
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Fuhrmann, K., Chini, R., Hoffmeister, V. H., Lemke, R., Murphy, M., Seifert, W., and Stahl, O.
- Subjects
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STAR observations , *STELLAR atmospheres , *BINARY stars , *SUNSHINE , *SPECTROGRAPHS , *SPECTRUM analysis , *ASTRONOMICAL observatories - Abstract
The Bochum Échelle 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. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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