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

question 102

Multiple Choice

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 above.