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The influence of the medium physical conditions and atomic constants on the Stokes profiles of absorption lines in the solar spectrum

The Stokes profiles of Fe I lines in the photosphere of the Sun are calculated within the Unno-Beckers-Landi-Dagl`Innocenti theory. Estimates of the magnetic strengthening of the lines were obtained. The changes in the Stokes profiles depending on the excitation potential, wavelength, equivalent width, Lande factor, micro-macroturbulent velocities, radial velocity, damping constant, atmospheric model, magnetic field strength and direction are considered. The graphically presented variations of the Stokes profiles make it possible to determine the initial values of the input parameters for solving the problems of magnetic field vector reconstruction by the inversion method. The presented dependencies of the magnetic strengthening on the line parameters will help to correctly select magnetically sensitive lines for the investigation of sunspots, flux tubes, plages, and other magnetic features.