Physics
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996kfnt...12e..32a&link_type=abstract
Kinematika i Fizika Nebesnykh Tel, vol.12, no.5, p. 32-47.
Physics
13
Sun: Mhd, Sun: Magnetic Fields, Sun: Polarization, Spectral Line
Scientific paper
To study the structure of spatially unresolved magnetic features on the Sun, Stokes profiles of seven photospheric iron lines are calculated using two-dimensional (2-D) non-stationary MHD models of solar granulation for various values of the magnetic flux. We investigate variations of calculated absolute wavelength shifts and bisectors of I profiles, zero-crossing wavelength shifts and parameters of asymmetry of amplitudes and areas of V profiles as functions of the magnetic field strength and time. The center-to-limb variations of Stokes profiles are analyzed. The iron abundance (7.57) has been obtained taking into account the unhomogeneities of the photosphere. It is shown that although most of simulating spectral effects resulting from 2-D models are basically in a satisfactory agreement with observational data, the 2-D approximation can not always give the quantitative fit. Calculated absolute wavelength shifts of Fe II lines are sufficiently smaller than observational ones.
Atroshchenko I. N.
Sheminova V. A.
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