Suppose You Discover a Binary Star System with a 0

question 109

Multiple Choice

Suppose you discover a binary star system with a 0.7 solar mass giant star and a 2 solar mass main sequence star.Why is this surprising?

• A)0.7 solar mass stars are not expected to become giants.
• B)All 2 solar mass stars should have left the main sequence.
• C)Giant stars are expected to destroy their companions, so the 2 solar mass star shouldn't exist.
• D)The 2 solar mass star should have become a giant before the 0.7 solar mass star.