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That is 356 watts of luminosity from something so small?! Whoa! It says the peak of the radiation has an energy of 41 keV though, so better not look at it directly (:

I tried plugging in some other numbers and, at first confusingly, found that the luminosity goes up at lower masses?! But of course it radiates from it's outer shell, not the entire volume.

Wonderful tool, imagine playing with those parameters in AR

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lupsasca 6 days ago | parent [-]

Yes, this is one of the wonderful crazy properties of black holes: they get hotter as they evaporate! (More precisely, the Hawking temperature is inversely proportional to the mass!)

	▲	mjrpes 6 days ago \| parent [-]
		It's crazy how hot and luminous they get. At 45 seconds left in a black hole's life, it has the luminosity of 85,000 megatons of TNT, and only gets exponentially hotter as those 45 seconds count down. In the last fraction of a second of it's life, with one metric ton of mass left, its luminosity is greater than the sun.