Kruskal-Szekeres diagram for collapsing stars and evaporating black holes

[Dr Tim]

Hi!

The model of a black hole that I find easiest to understand is the
Kruskal-Szekeres diagram.
It makes the causal relationships so clear.
But the basic diagram works only for a PERMANENT black hole.

Can anyone direct me to a KS diagram for a collapsing star, or for a
black hole that evaporates?

Thanks!

[Jonathan Thornburg [remove -animal to reply]]

Misner, Thorne, & Wheeler figure 32.1(b) shows a collapsing star
in Kruska-Szekeres coordinates.

--
-- "Jonathan Thornburg [remove -animal to reply]" <jth...@astro.indiana-zebra.edu>
Dept of Astronomy, Indiana University, Bloomington, Indiana, USA
"Washing one's hands of the conflict between the powerful and the
powerless means to side with the powerful, not to be neutral."
-- quote by Freire / poster by Oxfam

[carlip...@physics.ucdavis.edu]

Dr Tim <timro...@paradise.net.nz> wrote:

[...]

> Can anyone direct me to a KS diagram for a collapsing star, or for a
> black hole that evaporates?

Do you mean a Carter-Penrose diagram? If so, for an evaporating
black hole the answer isn't known. because we don't know what
happens in the final stages of evaporation. If you look , for example,
at http://arxiv.org/abs/arXiv:0801.1811, you'll see the "conventional"
diagram on page 1, and a possible alternative on page 4.

Steve Carlip

[Dr Tim]

> Do you mean a Carter-Penrose diagram?

...
> Steve Carlip

Probably not. The diagram you mention doesn't look like a KS diagram
to me.
Maybe it is *half* a KS diagram.