In the double-exhaust model, the radio lobes of a radio galaxy are inflated by
A)jets of excited gas flowing from the central galaxy.
B)jets of high-energy sound waves flowing from the central galaxy.
C)a disk of ionized material that orbits very near a supermassive black hole.
D)dark clouds of very cold gas and dust.
E)None of the other choices are correct.

Question

Quizplus · Accepted Answer

Jets of excited gas flowing from the central galaxy are responsible for inflating the radio lobes of a radio galaxy in the double-exhaust model. These jets are directed outwards from the vicinity of a supermassive black hole at the galaxy's center, carrying energy and material into the surrounding space, where they form the observed radio lobes.

In the Double-Exhaust Model, the Radio Lobes of a Radio