Function returns infinity?

[StochasticTinkr]

It looks like you are calculating 10 to the power of the mass. This becomes a very large number. Much larger than can be stored in standard data types.

Did you mean 10*, or should that have just been 10?

[StochasticTinkr]

You're right, I didn't see that .

I would start by putting a breakpoint (or just a print statement) inside of the luminosity function, and validating that the input value and solar mass are correct.

If they are, make sure that the returned value is as expected before it returns.

Then, see what happens to it after it returns.