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Journal Article

The trumpet solution from spherical gravitational collapse with puncture gauges


Rezzolla,  Luciano
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Thierfelder, M., Bernuzzi, S., Hilditch, D., Bruegmann, B., & Rezzolla, L. (2011). The trumpet solution from spherical gravitational collapse with puncture gauges. Physical Review D, 83: 064022. doi:10.1103/PhysRevD.83.064022.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-08F3-8
We investigate the stationary end-state obtained by evolving a collapsing spherical star with the gauges routinely adopted to study puncture black holes. We compare the end-state of the collapse with the trumpet solution found in the evolution of a single wormhole slice and show that the two solutions closely agree. We demonstrate that the agreement is caused by the use of the Gamma-driver shift condition, which allows the matter to fall inwards into a region of spacetime that is not resolved by the numerical grid, and which simultaneously finds the stationary coordinates of the trumpet outside the matter.