Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-06-14
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures, contributed talk to the Second Kolkata Conference on Observational Evidence for Black Holes in the Univers
Scientific paper
10.1063/1.3009511
The gravitational collapse of a star is an important issue both for general relativity and astrophysics, which is related to the well known "frozen star" paradox. Following the seminal work of Oppenheimer and Schneider (1939), we present the exact solution for two dust shells collapsing towards a pre-existing black hole. We find that the inner region of the shell is influenced by the property of the shell, which is contrary to the result in Newtonian theory and and the clock inside the shell becomes slower as the shell collapses towards the pre-existing black hole. This result in principle may be tested experimentally if a beam of light travels across the shell. We conclude that the concept of the "frozen star" should be abandoned, since matter can indeed cross a black hole's horizon according to the clock of an external observer. Since matter will not accumulate around the event horizon of a black hole, we predict that only gravitational wave radiation can be produced in the final stage of the merging process of two coalescing black holes. Our results also indicate that for the clock of an external observer, matter, after crossing the event horizon, will never arrive at the "singularity" (i.e. the exact center of the black hole.
Liu Yuan
Zhang Shuang Nan
No associations
LandOfFree
The exact dynamical solution for two dust shells collapsing towards a black hole does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The exact dynamical solution for two dust shells collapsing towards a black hole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The exact dynamical solution for two dust shells collapsing towards a black hole will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-495478