Re: Dark matter, can it form black holes?

On May 16, 6:54 pm, "N:dlzc D:aol T:com \(dlzc\)" <d...@xxxxxxx>
wrote:
Dear collection60:

<collectio...@xxxxxxxxxxxxxx> wrote in message

news:1179313134.118527.112610@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

I'm curious, can dark matter form black holes?

Dark Matter only interacts gravitationally, which means it cannot
interact through collision to form a mass center. As Greg Neill
says, it can be added to an existing black hole. It probably
cannot be the "trigger" that turns a neutron star into a black
hole.

But perhaps that works in both directions? What if... normal matter
has repulsive forces as well as attractive, and dark matter only has
attractive? Wouldn't that make it MORE likely to form black holes ? ;)

Interesting question anyhow.

Also, what about exotic gravitational effects, like tidal forces.
Couldn't that help knock dark matter out of orbit and into a black
hole?

Or can dark matter be sucked into a normal black
hole?

Yes.

What are the limits to how much dark matter
can compress to?

I don't see any problem in it being "at the central singularity"
of a black hole. But you cannot contain it with some device, and
compress it. It should blow right through any container, and
will not interact with its own kind.... except gravitationally.

Note that a black hole is not a container... There is no
direction that is "out" once you are inside. A really good Klein
bottle...

David A. Smith

Thanks. Interesting answer. I'm not too worried about what is "inside
or out", seeing as I never hope to be inside a black hole. From the
outside, the inside really is the inside. :)

.