  The interaction of a supermassive black hole with the matter of an accretion
disk in the presence of a magnetic field is the key mechanism of energy release
in active galactic nuclei. However, determining the physical parameters of this
system, such as the spin and mass of the black hole, the shape and parameters
of the rotation of the accretion disk, and the geometry of the magnetic field
in the accretion disk is a complex and not completely solved problem. We have
previously shown, based on our numerical models, that these estimates can be
obtained from just three parameters: the black hole mass, bolometric
luminosity, and optical polarization. In this paper, we estimate the accretion
disk and black hole parameters for a sample of 14 type 1 Seyfert galaxies.
Using the spectropolarimetric data obtained by us, we selected only those
objects in which the polarization of optical radiation is generated mainly by
the mechanism in the accretion disk. Despite the small statistics, our results
for such a sample are consistent with our previous conclusions and show a
discrepancy between the disk magnetic field parameters and the classical
Shakura-Sunyaev disk model.
