How Many Times Longer Does a 2 M _$\odot$ Main-Sequence Star Live Compared to a 10 M

Question

Examlex · Accepted Answer

The Answer is Main-sequence lifetime:

au

_MS = 10¹⁰ yr * (M/M _$\odot$ ) ^- ^2.5
2M_$\odot$:

au

_MS = 10¹⁰ yr * 2^-^2.5 = 1.8 * 10 ⁹ yr = 1.8 billion yr.
10M_$\odot$:

au

_MS =10¹⁰ yr = 10^-^2.5 = 3.1* 10⁷ yr = 0.031 billion yr.
Therefore, the 2M _$\odot$ star lives 1.8/0.031 = 58 times longer than the 10M _$\odot$ star.

How Many Times Longer Does a 2 M ⊙\odot⊙ Main-Sequence Star Live Compared to a 10 M

Definitions:

How Many Times Longer Does a 2 M _$\odot$ Main-Sequence Star Live Compared to a 10 M