Re: Chandra and black hole abundance

From: John Clark (
Date: Sun Jan 16 2000 - 23:53:59 MST

Jeff Davis <> Wrote:

> If mini black holes were made in the big bang, and if they "evaporate"
> (unless refueled!), they would have been most numerous right after the big
> bang.

That's right, anything very small would be long gone. The lighter a black
hole gets the hotter it gets, hot things give off radiation and that energy must
come from someplace, so the black hole must get even lighter (E=MC^2)
and thus even hotter. That's positive feedback . In its last second of life a
black hole literally explodes with about a million megatons of force, not a lot
of energy on the cosmic scale. Those made in the big bang and as massive
as a medium sized mountain should be blowing up right about now, but so far
at least nobody has spotted one.

>What happens when a mini black hole plunges into an earth

Probably not much, a mini black hole would pull matter into itself but
because it's only the size of a proton it couldn't eat much.

        John K Clark

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