POLARIZED SCATTERING WITH PASCHEN-BACK EFFECT, HYPERFINE STRUCTURE, AND PARTIAL FREQUENCY REDISTRIBUTION IN MAGNETIZED STELLAR ATMOSPHERES

F-state interference significantly modifies the polarization produced by scattering processes in the solar atmosphere. Its signature in the emergent Stokes spectrum in the absence of magnetic fields is depolarization in the line core. In the present paper, we derive the partial frequency redistribut...

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Published inThe Astrophysical journal Vol. 786; no. 2; pp. 1 - 7
Main Authors Sowmya, K, Nagendra, K N, Stenflo, J O, SAMPOORNA, M
Format Journal Article
LanguageEnglish
Published United States 10.05.2014
Subjects
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Atomic structure
COUPLING
DEPOLARIZATION
F STATES
Fluid flow
HYPERFINE STRUCTURE
INTERFERENCE
MAGNETIC FIELDS
PASCHEN-BACK EFFECT
POLARIZATION
SCATTERING
SOLAR ATMOSPHERE
Solar magnetic field
SPECTRA
SPIN
STOKES PARAMETERS
SUN
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Summary:F-state interference significantly modifies the polarization produced by scattering processes in the solar atmosphere. Its signature in the emergent Stokes spectrum in the absence of magnetic fields is depolarization in the line core. In the present paper, we derive the partial frequency redistribution (PRD) matrix that includes interference between the upper hyperfine structure states of a two-level atom in the presence of magnetic fields of arbitrary strengths. The theory is applied to the Na I D sub(2) line that is produced by the transition between the lower J = 1/2 and upper J = 3/2 states which split into F states because of the coupling with the nuclear spin I sub(s) = 3/2. The properties of the PRD matrix for the single-scattering case is explored, in particular, the effects of the magnetic field in the Paschen-Back regime and their usefulness as a tool for the diagnostics of solar magnetic fields.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/786/2/150