supermassive black hole
(black hole with a mass of millions to billions of solar masses)
A supermassive black hole (SMBH) is
a large black hole, often in the center of a galaxy.
A black hole is considered "supermassive" if its mass
is on the order of millions (or hundreds of thousands)
of solar masses or more, sometimes cited as 108 through
109 as typical.
The largest observed as of 12/2012
is on the order of 20 billion solar masses.
Such large black holes are considered the energy source
for an active galactic nucleus (AGN). Such a black hole has been detected
in the center of the Milky Way by observing the tight
orbits of stars around it.
A supermassive binary black hole (SMBBH) is two orbiting
SMBHs. They are thought to result from galaxy mergers.
Regarding terms, SBH is occasionally used to mean SMBH,
but perhaps more often to mean "stellar black hole".
SMBH unfortunately might be used or read to mean
"stellar mass" or "solar mass", but its use as "supermassive"
appears pretty consistent.
(black holes,galaxies,object type)
Referenced by pages:
active galactic nucleus (AGN)
broad emission line region
black hole accretion rate (BHAR)
black hole binary (BHB)
black hole (BH)
broad-line region (BLR)
binary SMBH (BSMBH)
direct collapse black hole (DCBH)
Event Horizon Telescope (EHT)
extreme mass ratio inspiral (EMRI)
final parsec problem
gravitational wave spectrum
International Pulsar Timing Array (IPTA)
Sombrero Galaxy (M104)
Messier 106 (M106)
Messier 84 (M84)
solar mass (MSun)
nanohertz gravitational waves
pulsar timing array (PTA)
Radio Galaxy Zoo (RGZ)
tidal disruption event (TDE)