Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 52, p. 11-15.(2015)

Local magnetic fields diagnostics in solar faculae using Fel 5233 line

V. Lozitsky, Dr. Sci.,
O. Osyka, Ph. D.,
V. Lyakh, stud.
Astronomical Observatory of Kyiv Taras Shevchenko National University, Kyiv

Abstract
The bisectors of I ± V Stokes profiles are analyzed for measurements of local magnetic field strengths in solar faculae of 7 August 2013observed on Echelle spectrograph of horizontal solar telescope of the Astronomical Observatory of Kyiv Taras Shevchenko National University. Obtained observational data indicate the inapplicability the weak-field and one-component approximation for this line. This follows from essential (till five times) differences of bisector splitting in different parts of line profile. A fine effect was found from analysis of mean-square deviation of observed bisector splitting from linear trend. This deviation has a maximum (relatively error level) on distance nearly 120 mǺ from line center that could indicate the presence of local magnetic field of about 7.4 kG.

Keywords
Sun, solar faculae, local magnetic fields

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