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| Paper: |
Polarized Line Formation with Incomplete Paschen-Back Effect and Partial
Frequency Redistribution |
| Volume: |
519, Radiative Signatures from the Cosmos |
| Page: |
113 |
| Authors: |
Sampoorna, M.; Nagendra, K. N.; Sowmya, K.; Stenflo, J. O.; Sowmya, K. |
| Abstract: |
Quantum interference between the hyperfine structure states is known
to depolarize the cores of some of the lines in the
linearly polarized spectrum of the Sun (the Second Solar Spectrum). The
presence of external magnetic fields in the line forming regions modify
these signatures through the Hanle, Zeeman, and incomplete/ complete
Paschen-Back effects (PBE), depending on the strength of the magnetic field. In
an earlier paper, Sowmya et al. (2014) derived the relevant collisionless partial
frequency redistribution (PFR) matrix for scattering on a two-level atom with
hyperfine structure splitting (HFS) and in the presence of arbitrary strength
magnetic fields (including the PBE regime). In the present
paper we solve the problem of polarized line transfer in a magnetized
atmosphere, including this PFR matrix. For this purpose, we apply a scattering
expansion method which is based on orders of scattering approach. We present
the results on the combined effects of PBE and PFR on the
polarized line profiles using the atomic parameters relevant to
the Na I D2 line. |
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