Re: A partial black hole?

On Mon, 25 Feb 2008 19:24:24 -0800, Erik Max Francis <max@[EMAIL PROTECTED]
>
wrote:

:
:There's no force known in our Universe which could sup****t such a 
:structure.  Neutron degeneracy, as you get with neutron stars, is 
:currently the high bidder, and that's not enough to withstand the 
:densities you'd need.  A neutron star inherently has less density than 
:what you need there, so it's well outside what would be its own event 
:horizon.  If you try to compress it/add more mass to get higher density, 
:then you will tip it over the edge where neutron degeneracy fails and 
:the object would collapse into a black hole.  There's no known middle 
:ground.

	Just jumping in here as a convenient point: 
what about ultralarge black holes?  Schwarzchild 
radius goes up, IIRC, as the square root of the mass, 
so the larger the black hole, the lower the density 
required to create it.  One could have a region of 
space with an overall density approximately that of a 
globular cluster, say, that would qualify as a black 
hole.  I guess the aggregate gravitational field would 
still be sufficient to cause a collapse into a singularity?  
Such a collapse could still take millenia...

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