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Hot gas around a supermassive black hole (SMBH) should be captured within thegravitational "sphere of influence", characterized by the Bondi radius. DeepChandra observations have spatially resolved the Bondi radii of at least fivenearby SMBHs. Contrary to earlier hot accretion models that predicted a steeptemperature increase within the Bondi radius, none of the resolved temperatureprofiles exhibit such an increase. The temperature inside the Bondi radiusappears to be complex, indicative of a multi-temperature phase of hot gas witha cooler component at about 0.2-0.3 keV. The density profiles within the Bondiregions are shallow, suggesting the presence of strong outflows. These findingsmight be explained by recent realistic numerical simulations that suggest thatlarge-scale accretion inside the Bondi radius can be chaotic, with cooler gasraining down in some directions and hotter gas outflowing in others. With anangular resolution similar to Chandra and a significantly larger collectingarea, AXIS will collect enough photons to map the emerging accretion flowwithin and around the "sphere of influence" of a sample of active galacticnuclei (AGNs). AXIS will reveal transitions in the inflow that ultimately fuelsthe AGN, as well as outflows that provide feedback to the environment.

Prospects for AGN Studies with AXIS: AGN Fueling -- Resolving Hot Gas inside Bondi Radius of SMBHs