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Title: 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 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.
Authors:
; ;  [1] ;  [2]
  1. Indian Institute of Astrophysics, Koramangala, Bengaluru (India)
  2. Institute of Astronomy, ETH Zurich, CH-8093 Zurich (Switzerland)
Publication Date:
OSTI Identifier:
22356905
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 786; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COUPLING; DEPOLARIZATION; F STATES; HYPERFINE STRUCTURE; INTERFERENCE; MAGNETIC FIELDS; PASCHEN-BACK EFFECT; POLARIZATION; SCATTERING; SOLAR ATMOSPHERE; SPECTRA; SPIN; STOKES PARAMETERS; SUN