The BOES spectropolarimeter for Zeeman measurements of stellar magnetic fields

Details The BOES spectropolarimeter for Zeeman measurements of stellar magnetic fields The BOES spectropolarimeter for Zeeman measurements of stellar magnetic fields

2007-07-28

arxiv.org/abs/0707.4220v1

Astronomy and Astrophysics

Astrophysics

12 figures

Scientific paper

10.1086/521959

We introduce a new polarimeter installed on the high-resolution fiber-fed echelle spectrograph (called BOES) of the 1.8-m telescope at the Bohyunsan Optical Astronomy Observatory, Korea. The instrument is intended to measure stellar magnetic fields with high-resolution (R $\sim$ 60000) spectropolarimetric observations of intrinsic polarization in spectral lines. In this paper we describe the spectropolarimeter and present test observations of the longitudinal magnetic fields in some well-studied F-B main sequence magnetic stars (m_v < 8.8^m). The results demonstrate that the instrument has a high precision ability of detecting the fields of these stars with typical accuracies ranged from about 2G to a few tens of gauss.

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