On the Matching Conditions for the Collapsing Cylinder

Details On the Matching Conditions for the Collapsing Cylinder On the Matching Conditions for the Collapsing Cylinder

2006-11-28

arxiv.org/abs/gr-qc/0611147v1

Class.Quant.Grav.24:1033,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Submitted to Class. Quant. Grav. as a comment

Scientific paper

10.1088/0264-9381/24/4/C01

We review the matching conditions for a collapsing anisotropic cylindrical perfect fluid, recently discussed in the literature (2005 {\it Class. Quantum Grav.} {\bf 22} 2407). It is shown that radial pressure vanishes on the surface of the cylinder, contrary to what is asserted in that reference. The origin of this discrepancy is to be found in a mistake made in one step of the calculations. Some comments about the relevance of this result in relation to the momentum of Einstein--Rosen waves are presented.

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