Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...194..268f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 194, no. 1-2, April 1988, p. 268-278.
Astronomy and Astrophysics
Astrophysics
41
Chromosphere, Linear Polarization, Polarization Characteristics, Resonance Lines, Asymptotic Methods, Doppler Effect, Iterative Solution, Magnetic Fields, Transfer Functions
Scientific paper
Polarization profiles of resonance lines formed in magnetic free semiinfinite atmospheres having either a uniform temperature or a chromospheric-type temperature rise are considered. In the isothermal case, a comparison is made between profiles calculated with the angle- and frequency-dependent R(II) partial redistribution and those given by the angle-averaged form of R(II), which is a simplified version of it introduced by Ayres (1985) and the Kneer (1975) approximation. It is found that, in chromospheric models, a maximum of polarization perpendicular to the surface appears at frequencies which are formed in the region of the temperature rise.
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