The chart shows characteristics of stars. sirius is a blue-white star with a surface temperature of about 9800 k. what is most likely the mass of sirius? 1.0 solar mass 1.4 solar mass 2.0 solar mass 12 solar mass

Definition of luminosity is the total amount of energy emitted by the star per unit of time. We can use following formula to calculate the luminosity:

Where A is the surface area of the star.
We also have a very important mass-luminosity relationship:

This formula gives us relationship between stars mass and it's luminosity. stands for Sun's luminosity and mass.
We can rewrite the luminosity formula like this:

Now if we divide this by the Sun's luminosity we get:

We can use this formula to estimate the mass. Surface temperature of the Sun is 5778 K.

The answer would be 2 solar masses.