What is a galaxy that was once a quasar is likely have?

Answer 1

A galaxy which was once a quasar is likely to have a supermassive black hole at its centre.

An accretion disc is formed when material falls into a young galaxy with a supermassive black hole at its center, surrounded by a large amount of gas and dust. The material gets superheated by friction and gravity and eventually emits large amounts of radiation; this is what is known as a quasar.

The galaxy will remain a quasar until the material surrounding the supermassive black hole runs out, unless it is eliminated by a collision with another galaxy.

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Answer 2

Luca de

A supermassive black hole is most likely located at the center of a galaxy that was formerly a quasar.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.