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Current spectropolarimeters and methods to measure stellar magnetic fields

Published online by Cambridge University Press:  03 November 2009

C. Neiner*
Affiliation:
GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 5 place Jules Janssen, 92190 Meudon, France
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Abstract

In this chapter I present methods to measure stellar magnetic fields, in particular the regression method used with low-resolution spectropolarimeters and the Least Square Deconvolution method used with high-resolution spectropolarimeters. I discuss the advantages and inconvenients of each method and the various instruments available as of today. I conclude on the best polarimeter to use depending on the science goal and type of studied objects, and provide a short summary of the two ongoing large programmes MaPP and MiMeS.

Type
Research Article
Copyright
© EAS, EDP Sciences, 2009

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