TRAP4 solves polarized radiative transfer with angle-dependent partial frequency redistribution for two-term atoms, is validated against HanleRT-TIC, and shows the angle-averaged approximation suffices for wavelength-integrated Lyman-alpha polarization.
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A numerical approach for modelling the polarisation signals of strong resonance lines with partial frequency redistribution. Numerical applications to two-term atoms and plane-parallel atmospheres
TRAP4 solves polarized radiative transfer with angle-dependent partial frequency redistribution for two-term atoms, is validated against HanleRT-TIC, and shows the angle-averaged approximation suffices for wavelength-integrated Lyman-alpha polarization.