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| Paper: |
The Role of Quantum Interference and Partial Redistribution in
the Solar Ba II D2 4554 Å Line |
| Volume: |
489, Solar Polarization 7 |
| Page: |
213 |
| Authors: |
Smitha, H. N.; Nagendra, K. N.; Stenflo, J. O.; Sampoorna, M. |
| Abstract: |
The Ba II D2 line at 4554 Å is a good example, where the
F-state interference effects due to the odd isotopes produce
polarization profiles, which are very different from those of the even
isotopes that do not exhibit F-state interference. It is therefore
necessary to account for the contributions from the different isotopes
to understand the observed linear polarization profiles of
this line. In this paper we present radiative transfer modeling with
partial frequency redistribution, which is shown to be essential
to model this line. This is because complete frequency redistribution
cannot reproduce the observed wing polarization.
We present the observed and computed
Q/I profiles at different limb distances. The theoretical profiles
strongly depend on limb distance (μ) and the model atmosphere which fits the
limb observations fails at other μ positions. |
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