Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mnras.411.2311f&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 411, Issue 4, pp. 2311-2318.
Astronomy and Astrophysics
Astronomy
5
Instrumentation: Spectrographs, Techniques: Spectroscopic, Binaries: Spectroscopic, Stars: Fundamental Parameters, Stars: Solar-Type
Scientific paper
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.
Chini Rolf
Fuhrmann Klaus
Hoffmeister Vera H.
Lemke Roland
Murphy Michael
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