Image Details
Caption: Figure B1.
Schematic of the recycling and pileup geometry inside the collisionless region. The flow is hydrodynamic near rB and becomes collisionless below rcoll. Most particles miss the GR loss cone on a single inward pass, return to rcoll, rethermalize, and either are recaptured or circularize after losing orbital energy to bremsstrahlung. Direct GR capture (loss cone) accounts for ∼0.2% of entrants; ∼33% are reflected at the centrifugal barrier, and ∼67% enter the recycling + circularization population.
© 2026. The Author(s). Published by the American Astronomical Society.