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Paper: Comoving Frame Method for Polarized PRD Line Transfer with Velocity Fields
Volume: 526, Solar Polarization Workshop 8
Page: 153
Authors: Sampoorna, M.; Nagendra, K. N.
Abstract: The solution of the transfer equation in moving atmospheres is a classical problem. While the low-velocity regime can be handled in a simpler manner using the observer's frame method, the regime of high-velocity requires the comoving frame technique to be applied. We show that even in the low-velocity regime (like that prevailing in the solar atmosphere) we require the comoving frame method when linear polarization together with partial frequency redistribution (PRD) in line scattering is considered. This situation arises because of the numerical difficulties that we encounter in the observer's frame method, namely, a heavy demand on the angle, frequency, and depth grids when we consider polarized line formation with PRD and velocity fields. These difficulties can be overcome by applying the comoving frame technique. Here we present the details of this technique and its applications to solar-like conditions.
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