| Description: | The Galactic center is an ideal laboratory for testing various theoretical models of the magnetized plasma flows onto compact objects. I will present highlights of general relativistic magnetohydrodynamic simulations of gas falling onto a black hole. Our models predict dynamical and radiative properties of hot accretion flows around a Kerr black hole. I will show how the Sgr A* observational data put constraints on the model parameters such as viewing angle, spin of the black hole or mass accretion rate. Also, the recent discovery of a cloud moving towards the Galactic Center creates a potential opportunity for testing models of Sgr A*. I will show one of the possible scenarios for the evolution of flux and size of the radio source in such an event of enhanced mass-accretion rate. Finally, I will discuss the current models limitations and prospects for detecting the black hole silhouette. |
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