Abstract:
The influence of magnetic field on the existence of two-phase medium in the transition layer between disk and corona in AGN is discussed. We solve the vertical structure of the disk driven by MRI together with radiative transfer in hydrostatic and radiative equilibrium, which allows us to point out how TI affects the corona for a wide range of global parameters. We show that magnetic heating is strong enough to heat upper layers of the accretion disk atmosphere, which form the warm corona covering the disk. Magnetic pressure does not remove TI caused by radiative processes operating in X-ray emitting plasma. TI stays a kind of "frozen" by magnetic field and plays the major role in the formation of the warm corona above magnetically driven accretion disk in AGN. The warm, Compton cooled corona, responsible for soft X-ray excess, resulting from our model has typical temperature in the range of 0.01 - 2 keV and optical depth even up to 50, which agrees with recent observations.

Should you have any questions about the event itself, do not hesitate to reach out to us on this following e-mail address: debora.lancova@physics.slu.cz.