Magnetic fields in the accretion disks for various inner boundary conditions

Context. The magnetic fields of accretion disks play an important role in studying their evolution. We may assume that its generation is connected to the dynamo mechanism, which similar with galactic disks. Aims. Here, we propose a model field disk uses same approaches have been used for galaxies. It necessary obtain field, expected be less than equipartition value, and without destroying disk. To do so, it formulate basic properties ionized medium estimate parameters governing dynamo. Methods. no- z approximation has developed thin also take different boundary conditions can change value significantly. Results. show strictly depends on conditions. Taking zero fixed condition inner boundary, are physical disk, avoid solutions greater field.