Quasi-Stellar Objects
E900473
Quasi-Stellar Objects, commonly known as quasars, are extremely luminous and distant active galactic nuclei powered by supermassive black holes accreting matter at the centers of young galaxies.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Quasi-Stellar Object | 0 |
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
active galactic nucleus
ⓘ
astronomical object ⓘ extragalactic object ⓘ |
| affects |
evolution of host galaxy
ⓘ
intergalactic medium through ionization ⓘ |
| alsoKnownAs |
QSO
NERFINISHED
ⓘ
quasar ⓘ |
| classification |
X-ray selected quasar
ⓘ
optically selected quasar ⓘ radio-loud quasar ⓘ radio-quiet quasar ⓘ |
| cosmologicalUse |
probe of the early universe
ⓘ
standardizable candle for cosmology (with caveats) ⓘ tracer of large-scale structure ⓘ |
| discoveredBy | Maarten Schmidt NERFINISHED ⓘ |
| drives |
powerful relativistic jets (in many cases)
ⓘ
strong outflows and winds ⓘ |
| emits |
X-rays
ⓘ
electromagnetic radiation across the spectrum ⓘ gamma rays ⓘ optical light ⓘ radio waves ⓘ ultraviolet radiation ⓘ |
| environment | center of an active galaxy ⓘ |
| firstSpectroscopicIdentificationYear | 1963 GENERATED ⓘ |
| hasProperty |
compact appearance
ⓘ
extremely luminous ⓘ high redshift ⓘ strong emission lines ⓘ variability in brightness ⓘ very distant ⓘ |
| locatedIn | center of a galaxy ⓘ |
| luminosityRange | up to 1000 times the luminosity of a large galaxy ⓘ |
| observedWith |
X-ray observatories
ⓘ
optical telescopes ⓘ radio telescopes ⓘ |
| originallyClassifiedAs | radio source with star-like optical counterpart GENERATED ⓘ |
| poweredBy |
accretion of matter onto a supermassive black hole
ⓘ
supermassive black hole ⓘ |
| redshiftRange | up to about 7.5 and higher ⓘ |
| spectralFeature |
broad emission lines
ⓘ
continuum dominated by accretion disk emission ⓘ narrow emission lines ⓘ |
| timeVariability | variability on timescales from days to years ⓘ |
| typicalBlackHoleMass |
billions of solar masses
GENERATED
ⓘ
millions of solar masses GENERATED ⓘ |
| typicalHost | young galaxy ⓘ |
| usedToStudy |
cosmic reionization
ⓘ
growth of supermassive black holes ⓘ intervening absorption systems ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.