The evolutionary cutoff between low- and high-mass stars occurs at approximately: A)1.5 M_⨀ B)1 M_⨀ C)3 M_⨀ D)5 M_⨀ E)10 M_⨀

Question

Quizplus · Accepted Answer

The evolutionary cutoff between low- and high-mass stars occurs at around 3 solar masses. This is because stars with a mass greater than 3 solar masses have a convective core during the main sequence stage. This convective core allows for the mixing of heavier elements, increasing the rate of nuclear fusion and leading to a shorter lifespan. Therefore, stars with a mass greater than 3 solar masses will have a shorter main-sequence lifespan than stars with a mass less than 3 solar masses.

The Evolutionary Cutoff Between Low- and High-Mass Stars Occurs at Approximately