supermassive

The supermassive black hole of M 87 and the kinematics of its associated gaseous disk
Supermassive Black Hole Accretion History Inferred from a Large Sample of Chandra Hard X-Ray Sources
The Stellar Cusp around the Supermassive Black Hole in the Galactic Center
Closest Star Seen Orbiting the Supermassive Black Hole at the Centre of the Milky Way
Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre.
A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way
Rapid X-ray flaring from the direction of the supermassive black hole at the Galactic Centre
Near-infrared flares from accreting gas around the supermassive black hole at the Galactic Centre.
Measuring Distance and Properties of the Milky Way’s Central Supermassive Black Hole with Stellar Orbits
High Proper Motion Stars in the Vicinity of SGR A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy