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Solar Polarimetry: Observations and Theories

Published online by Cambridge University Press:  25 April 2016

David E. Rees
David E. Rees*
Affiliation:
Department of Applied Mathematics, University of Sydney
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Extract

This review surveys some recent observations of polarization in solar spectral lines with emphasis on their theoretical interpretation. Solar optical polarimetry is concerned primarily with measuring solar magnetic fields, a quest which began with Hale’s (1908) observation of Zeeman splitting in a sunspot. Today a wide range of optical polarimeters is used for solar research (see Bauer (1981) for a comprehensive review). For example, a standard magnetograph (Babcock 1953) detects circular polarization in selected wavelength bands in the wings of a Zeeman sensitive line, providing information on the line of sight or longitudinal field component. The most sophisticated instrument is a Stokes polarimeter (e.g. Bauer et al 1980, 1981) which measures with high spectral resolution the profiles of all four Stokes parameters (I,Q,U,V) across a spectral line. Such a device potentially provides all the data needed to infer the vector magnetic field.

Type
Invited Papers
Information
Publications of the Astronomical Society of Australia , Volume 4 , Issue 4 , 1982 , pp. 335 - 341
Copyright
Copyright © Astronomical Society of Australia 1982

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