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- Path: sparky!uunet!cs.utexas.edu!tamsun.tamu.edu!zeus.tamu.edu!dwr2560
- From: dwr2560@zeus.tamu.edu (RING, DAVID WAYNE)
- Newsgroups: sci.physics
- Subject: Re: Black hole insights
- Date: 25 Jan 1993 20:10 CST
- Organization: Texas A&M University, Academic Computing Services
- Lines: 16
- Distribution: world
- Message-ID: <25JAN199320103206@zeus.tamu.edu>
- References: <C18EqF.86x@megatest.com> <1jtf4sINNrcd@gap.caltech.edu>
- NNTP-Posting-Host: zeus.tamu.edu
- Summary: Coordinate time to reach the horizon depends on coordinates
- News-Software: VAX/VMS VNEWS 1.41
-
- brahm@cco.caltech.edu (David E. Brahm) writes...
- >What I want to know is, when people calculate how much "time" it takes for
- >a black hole to evaporate (proportional to M^3 they say), what coordinate
- >are they talking about?
-
- External time. The calculation goes like this: the radiation rate is
- calculated for static BH of mass M, and the result is integrated to
- get the evaporation time.
-
- > Perhaps I'm just being
- >irresponsible using Schwarzschild coordinates when M is changing.
-
- You're not alone. :-)
-
- Dave Ring
- dwr2560@zeus.tamu.edu
-