Evidence that supports quasars being the nuclei of very distant galaxies includes
A) the existence of quasar fuzz.
B) the observation of a supernova near a quasar whose distance from its brightness is consistent with the large redshift.
C) gravitational lensing of some quasars by nearby galaxies.
D) all of the above.
E) none of the above.

Question

Quizplus · Accepted Answer

A) Quasar fuzz is a diffuse and low-luminosity emission that surrounds some quasars, indicating that there is a massive and extended source of energy at their centers, which is consistent with the idea that they are active galactic nuclei.

B) The distance to a quasar can be determined from its redshift, which is a measure of how much its light has been stretched by the expansion of the universe. If a supernova is observed near a quasar, its brightness can be used to determine its distance as well. If the distance determined from the supernova matches the distance inferred from the redshift, it supports the idea that the quasar and the host galaxy are at the same distance.

C) Gravitational lensing occurs when the gravitational field of a massive object deflects the path of light passing near it, causing an apparent distortion or amplification of the image of a distant object. If a quasar is lensed by a nearby galaxy, it provides evidence that they are physically associated and that the quasar is embedded in the galaxy's nucleus.

Therefore, all of the above provide evidence that supports the idea that quasars are the nuclei of very distant galaxies.

Evidence That Supports Quasars Being the Nuclei of Very Distant