本题目来源于试卷: Nuclear & Quantum Physics E.5 Stellar Properties & Processes，类别为 IB物理学
[单选题]
A star with a mass of twice the mass of the sun isry;,k5g(qlnys8b h+d a main sequence star. Thb043zcs0p pdye time the sun is expected to spe 04cd 3pys0zbpnd in the main sequence is T. Which of the following is correct for the time the star is expected to spend in the main sequence and the next stage in its evolution?
A. Time is More than T ; Stage is Red giant
B. Time is More than T ; Stage is Supergiant
C. Time is Less than T ; Stage is Red giant
D. Time is Less than T ; Stage is Supergiant
参考答案: C
本题详细解析:
Explanation: The stars have greater mass have higher luminosity which results in a shorter time to run out of hydrogen. Therefore, the lifetime of a star on the main sequence is roughly inversely proportional to the mass of the star. Since the star has greater mass than the sun, time is less than T. Moreover, the mass of the star is less than four times the solar mass. Hence, it is a moderate-mass star and it will become a red giant in its next evolutionary stage.
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