Stokes profile analysis and vector magnetic fields. IV - Synthesis and inversion of the chromospheric MG I B lines

Details Stokes profile analysis and vector magnetic fields. IV - Synthesis and inversion of the chromospheric MG I B lines Stokes profile analysis and vector magnetic fields. IV - Synthesis and inversion of the chromospheric MG I B lines

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...330..493l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 330, July 1, 1988, p. 493-512. Research supported by the High Altitude Obse

Astronomy and Astrophysics

Astrophysics

44

Chromosphere, Line Spectra, Magnetic Field Configurations, Solar Magnetic Field, Stokes Law Of Radiation, Least Squares Method, Magnesium, Optical Thickness, Thermodynamic Equilibrium

Scientific paper

An analytic solution to the transfer equations for polarized radiation which allows for departures from LTE in the overall excitation of a chromospheric line is discussed, and a method of least-squares inversion is applied to profiles of Mg I b lines at 5172.7 and 5183.6 A observed in December 1978. An analytic form expressing the source function dependence on line-center optical depth leads to a generalization of an existing least-squares procedure which is found to be effective in recovering the magnetic field from simulated Stokes profiles under specified conditions. Reasonable magnetic field values are obtained if a macroturbulent profile smearing of 1-2 km/s is used and if the profiles are corrected for scattered light.

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