The Radio Emission from the Jets in a Double-Radio Source

question 41

Multiple Choice

The radio emission from the jets in a double-radio source is

• A) recombination radiation from electrons combining with protons to form neutral hydrogen gas as the gas cools within the jets.
• B) 21-cm emission from neutral hydrogen atoms.
• C) thermal emission from very hot matter ejected from the accretion disk around the central black hole.
• D) synchrotron radiation from relativistic electrons spiraling in magnetic fields.

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