Which of these variable stars would be classified as an RR Lyrae?
A) a K giant with a period of 14 days
B) a pulsar with a period of 0.14 seconds
C) a B supergiant with a period of 0.14 days
D) an F giant with a period of 14 hours
E) an M giant with a period of 140 days

Question

Quizplus · Accepted Answer

RR Lyrae stars are typically A or F type giants or subgiants with periods of pulsation ranging from about 0.2 to 1 day, making an F giant with a period of 14 hours (or 0.58 days) the correct choice.

Which of These Variable Stars Would Be Classified as an RR