Heating and Cooling of Hot Accretion Flows by Nonlocal Radiation

摘要

We consider nonlocal effects that arise when radiation emitted at one radius of an accretion disk either heats or cools gas at other radii through Compton scattering. We discuss three situations: 1. Radiation from the inner regions of an advection-dominated flow Compton cooling gas at intermediate radii and Compton heating gas at large radii. 2. Soft radiation from an outer thin accretion disk Compton cooling a hot one- or two-temperature flow on the inside.3. Soft radiation from an inner thin accretion disk Compton cooling hot gas in a surrounding one-temperature flow.