would the sun be more luminous if....?

Question

it were the same size but hotter? if it had the same surface temperature but were more massive? Explain.



thanks!
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Answer 1

A hotter surface emits more light per unit area, so yes to the first.

Maybe to the second. If it had a larger surface area then it would be brighter, but the question only says the mass is larger. Now in real stars, a larger mass usually means a larger surface area, but not always. A white dwarf for example could have a larger mass that the Sun but be much smaller than the Sun.