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On the Sensitivity of Partial Redistribution Scattering Polarization Profiles to Various Atmospheric Parameters

Bibcode
2010ApJ...722.1269S
DOI
10.1088/0004-637X/722/2/1269
Sampoorna, M.; Trujillo-Bueno, J.; Landi Degl'Innocenti, E.
Bibliographical reference

The Astrophysical Journal, Volume 722, Issue 2, pp. 1269-1289 (2010).

Advertised on:
10
2010
Journal
The Astrophysical Journal
Number of authors
3
IAC number of authors
3
Citations
14
Refereed citations
10
Description
This paper presents a detailed study of the scattering polarization profiles formed under partial frequency redistribution (PRD) in two thermal models of the solar atmosphere. Particular attention is given to understanding the influence of several atmospheric parameters on the emergent fractional linear polarization profiles. The shapes of these Q/I profiles are interpreted in terms of the anisotropy of the radiation field, which in turn depends on the source function gradient that sets the angular variation of the specific intensity. We define a suitable frequency integrated anisotropy factor for PRD that can be directly related to the emergent linear polarization. We show that complete frequency redistribution is a good approximation to model weak resonance lines. We also show that the emergent linear polarization profiles can be very sensitive to the thermal structure of the solar atmosphere and, in particular, to spatial variations of the damping parameter.
Related projects
Project Image
Magnetism, Polarization and Radiative Transfer in Astrophysics

Magnetic fields pervade all astrophysical plasmas and govern most of the variability in the Universe at intermediate time scales. They are present in stars across the whole Hertzsprung-Russell diagram, in galaxies, and even perhaps in the intergalactic medium. Polarized light provides the most reliable source of information at our disposal for the

Tanausú del
Pino Alemán
In progress
Type
Refereed
Radiative transfer
Solar Physics (FS)

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