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

Question

Quizplus · Accepted Answer

Cepheid variables are typically giant or supergiant stars with periods ranging from a few days to over a month. A K giant with a period of 14 days fits within the expected characteristics of Cepheid variables, which are known for their relatively short and regular pulsation periods.

Which of These Variable Stars Would Be Classified as a Cepheid