Why do we not consider stars with masses more than 1.5 solar masses in the Drake

Question

Why do we not consider stars with masses more than 1.5 solar masses in the Drake equation when estimating the number of possible stars in the milky way galaxy around which planets could form that would support our kind of intelligent life?

A more massive star would produce so much damaging UV radiation that it would sterilize its planets

More massive stars would produce massive planets on which life would not be possible

More massive stars would have evolved so rapidly that an advanced civilization would not have had time to evolve and develop

More massive stars would never reach temperatures sufficient to maintain life-supporting conditions on the surface of its planets

Explanation / Answer

The answer is :

More massive stars would never reach temperatures sufficient to maintain life-supporting conditions on the surface of its planets.

So, stars with masses more than 1.5 solar masses are not considered in the Drake Equation.

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