What is the most important factor that determines the point in the Hertzsprung-Russell diagram where a protostar reaches the main sequence?
A) The initial luminosity of the protostar
B) The size of the interstellar cloud from which the protostar formed
C) The initial temperature of the protostar
D) The mass of the protostar

Question

Quizplus · Accepted Answer

The mass of the protostar is the most important factor in determining when it will reach the main sequence. This is because the mass of the star determines the temperature at its core, which then determines the rate of nuclear fusion and the resulting luminosity. Higher mass stars will have higher core temperatures and luminosities, leading to a quicker arrival at the main sequence.

What Is the Most Important Factor That Determines the Point