General relativity predicts that images of optically thin accretion flows around black holes
should generically have a “photon ring”, composed of a series of increasingly sharp …

Recent interferometric observations by the Event Horizon Telescope have resolved the
horizon-scale emission from sources in the vicinity of nearby supermassive black holes …

Context. Low-luminosity supermassive and stellar-mass black holes (BHs) may be
embedded in a collisionless and highly magnetized plasma. They show nonthermal flares …

Horizon-scale observations from the Event Horizon Telescope (EHT) have enabled
precision study of supermassive black hole accretion. Contemporary accretion modeling …

The centers of our Galaxy and the nearby Messier 87 are known to contain supermassive
black holes, which support accretion flows that radiate across the electromagnetic spectrum …

Currently envisioned extensions of the Event Horizon Telescope to space will soon target
the black hole photon ring: a narrow ring-shaped imprint of a black hole's strong gravity …

General relativity predicts that black hole images ought to display a bright, thin (and as-of-yet-
unresolved) ring. This" photon ring" is produced by photons that explore the strong gravity of …

Employing 3D GRMHD simulation, we study the images of a geometrically thin jet, whose
emissions concentrate on its surface, for accretion system surrounding a central spinning …

Tidal disruption events (TDEs) around supermassive black holes (SMBHs) are a potential
laboratory to study super-Eddington accretion disks and sometimes result in powerful jets or …

This work proposes a methodology for testing phenomenologically motivated emission
processes that account for the flux and polarization distribution and global structure of the …