Zeeman Broadening in Optical Stokes I of Solar-like Stars

Details Zeeman Broadening in Optical Stokes I of Solar-like Stars Zeeman Broadening in Optical Stokes I of Solar-like Stars

2010-12-14

arxiv.org/abs/1012.2968v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 1 figure. Proceedings of the 16th Workshop on Cool Stars, Stellar Systems, and the Sun (Seattle, WA, Aug 29 - Sep 2,

Scientific paper

We present our analysis aimed at inferring average magnetic fields in slowly-rotating solar-like stars. Using the spectral line inversion code SPINOR, we perform high-accuracy line profile fitting and investigate whether Zeeman broadening can be reliably detected in optical data of unprecedented quality. We argue that our usage of both high- and low-g_{eff} lines does provide a certain sensitivity to magnetic fields that may, indeed, be detected. However, the measurement is subject to a model dependence and prone to ambiguities, e.g. due to spectral blends. Hence, while a field may be successfully recovered, the quantification of this field is subject to large uncertainties, even for the highest-quality optical data.

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