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The black holes that are the centers of quasars need to be big - like center of the galaxy-big, but they also need a large accretion disc around them, feeding them. The quasar-radiation we detect comes from the matter continuously falling into the black hole from the accretion disc.
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A quasar is a powerfully broadcasting stellar source. By definition, a black hole does not emit any visible radiation, light or radio waves (they can emit Hawking radiation, which is different). The radiation that is created and focused by a quasar would originate "around" the black hole as material is rapidly accelerated. The most likely source of quasars are supermassive black holes (the mass of a billion stars or more) that are drawing in stars from a large galaxy or galactic cluster.
Given their great distance from Earth, today's quasars were active billions of years ago, and there is evidence that suggests they are decreasing in number as the universe ages.
What else can I help you with?
How do quasars regulate the growth of black holes?
A quasar is a disk of superheated material falling into a supermassive black hole. The radiation from a quasar is so intense that it actually pushes matter away from the black hole, preventing it from falling in. This process limits how fast a black hole can grow.
What is a quasar and what does it have to do with a black hole?
A quasar is a galaxy that is radiating massive amount of radioactive energy. A quasar MAY have a black hole at it's center. A black hole is just dead star that collapsed in on itself.
What is bigger a quasar or a supermassive black hole?
The quasar is bigger. A quasar is a disk of superheated matter that surrounds a supermassive black hole. The mass of the black hole may be greater than that of the disk, but it is compacted into a smaller space.
How does a quasar work?
A quasar is believed to have a supermassive black hole at its center. The radiation is emitted outside the black hole's event horizon - from matter that is falling into the black hole.
Is a quasar bigger than a massive black hole?
Yes. A quasar is a disk of superheated material that sour rounds a supermassive black hole.
Is the biggest quasar able to destroy the biggest supermassive black hole?
No, the biggest quasar is not capable of destroying the biggest supermassive black hole. Quasars are powered by the accretion of material onto supermassive black holes, so they are closely related. The interaction between a quasar and its host black hole is complex but does not result in the destruction of the black hole.
What is at center of a quasar?
A Supermassive black hole .
What is bigger a quasar or a black hole?
It depends, Black holes can go from being microscopic to supermassive black holes that entire galaxies revolve around. It all depends on which black hole and which quasar.
Are quasar's different from supermassive black holes?
Yes. In simplistic terms, a quasar is the result of a supermassive black hole. The gravitational attraction of the supermassive black hole on the galaxy, causes the effect of the quasar. See related questions for more information.
What can be found in the center of a quasar?
A big black hole.
Why the relationship between a quasar and a black hole e interest for astronomers?
For one, a black hole can hardly be observed directly (the Hawking radiation is expected to exist, but it would be way too weak). A quasar (related to material falling into the black hole) is one way the black hole can be observed.Also, the quasar can play quite an active role in the formation of a galaxy.
Is a quasar a type of galaxy?
No. A Quasar is a Black hole in center of some Galaxies. I think our Galaxy has one of them.
