🚀 go-pugleaf

drabik@tech.ascom.ch (Pascal &) writes:
>   Can someone describe me how a black hole can evolve? I think it is
>created in a super nova, then it collects matter from other stars. It
>can melt by losing energy. Eventually, can it explode?

Yes, we expect nucleation to proceed from supernovae and the BH can then
collect matter. The evaporation will take a VERY long time though
for these (solar mass and above) holes, and thus you don't expect
them to reach the final stages in a time comparable to the age of our
universe. The holes that may be exploding now (or, rather, that
we could see exploding now) would be PRIMORDIAL holes, created from
instablity effects during the big bang itself. These little chappies
are so small that their lifetime is short enough. Whether or not
they'll be an explosion is an open question; some of us believe that
Hawking evaporation may be highly dependent on small scale physics,
and thus we can't be totally sure that it happens. If it DOES happen then
they'll probably be some form of explosion. In fact, we recently had a
meeting in which Stephen Hawking suggested that the final stage ends
in a`thunderbolt' singularity, which destroys the universe. It's
probable that there's someway out of it, as some BHs SHOULD have
gone off by now <grin>.

>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>Dr. Pascal DRABIK            Tel:     +41 31-999-32-22        % You'll never %
>Ascom Tech Ltd.              Telefax: +41 31-999-36-07        %  know until  %
>Freiburgstrasse, 370                                          %  you try...  %
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Ahhh, Freiburgstrasse! I know the Ascom offices :). I used to work at the
Universtaet Bern ITP :).

				Steve

--
| Name: Stephen P. Braham | Perversion: Quantum Cosmologist|
| Hangout: UBC physics    | Signature:  Euclidean          |
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