Open AccessBESO échelle spectroscopy of solar‐type stars at Cerro Armazones
Author(s) -
Fuhrmann K.,
Chini R.,
Hoffmeister V. H.,
Lemke R.,
Murphy M.,
Seifert W.,
Stahl O.
Publication year - 2011
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2010.17850.x
Subject(s) - physics , stars , spectroscopy , astrophysics , astronomy
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.