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Formation of polarized spectral lines in atmospheres with horizontal inhomogeneities

Published online by Cambridge University Press:  24 July 2015

A. Tichý ,
J. Štěpán ,
J. Trujillo Bueno  and
J. Kubát
A. Tichý
Affiliation:
Astronomical Institute, Academy of Sciences of the Czech Republic, Ondřejov, Czech Republic Faculty of Science, Masaryk Univerzity, Brno, Czech Republic e-mail: adamt@physics.muni.cz
J. Štěpán
Affiliation:
Astronomical Institute, Academy of Sciences of the Czech Republic, Ondřejov, Czech Republic
J. Trujillo Bueno
Affiliation:
Instituto de Astrofisica de Canarias, 38205 La Laguna, Tenerife, Spain Universidad de La Laguna, Departamento de Astrofísica, 38206 La Laguna, Tenerife, Spain Consejo Superior de Investigaciones Científicas, Spain
J. Kubát
Affiliation:
Astronomical Institute, Academy of Sciences of the Czech Republic, Ondřejov, Czech Republic
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Abstract

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We study the problem of the generation and transfer of spectral line intensity and polarization in models of stellar atmospheres with horizontal plasma inhomogeneities. We solve the non-LTE radiative transfer problem in full 3D geometry taking into account resonant scattering polarization and its modification by magnetic fields via the Hanle effect. We show that horizontal fluctuations of the thermodynamical conditions of stellar atmospheres can have a significant impact on the linear polarization of the emergent spectral line radiation and its center-to-limb variation.

Keywords

Polarizationradiative transferscattering
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S305: Polarimetry: From the Sun to Stars and Stellar Environments , December 2014 , pp. 401 - 406
Copyright
Copyright © International Astronomical Union 2015 

References

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