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.

---

Definitions:

Retained Earnings

The portion of a company's profits not distributed as dividends to shareholders, instead reserved for reinvestment in the business or to pay off debt.

Large Stock Dividends

Distribution of a greater than typical percentage of shares to shareholders, typically impacting the stock's value and distribution.

Par Value

The face value of a bond or stock as stated by the issuing company, which does not necessarily match its market value.

Stated Value

An arbitrary value assigned to no-par value stock by the board of directors of a company, used for accounting purposes.