6533b7d4fe1ef96bd1261c11
RESEARCH PRODUCT
3-D collapse of rotating stars to Kerr black holes
Luciano RezzollaLuciano RezzollaFrank LöfflerIan HawkePedro J. MonteroJosé A. FontLuca BaiottiNikolaos StergioulasEdward SeidelEdward Seidelsubject
PhysicsHistoryEvent horizonWhite holeMagnetospheric eternally collapsing objectCompact starComputer Science ApplicationsEducationBlack holeGeneral Relativity and Quantum CosmologyNumerical relativityClassical mechanicsRotating black holeGravitational collapsedescription
We study gravitational collapse of uniformly rotating neutron stars to Kerr black holes, using a new three-dimensional, fully general relativistic hydrodynamics code, which uses high-resolution shock-capturing techniques and a conformal traceless formulation of the Einstein equations. We investigate the gravitational collapse by carefully studying not only the dynamics of the matter, but also that of the trapped surfaces, i.e. of both the apparent and event horizons formed during the collapse. The use of these surfaces, together with the dynamical horizon framework, allows for a precise measurement of the black-hole mass and spin. The ability to successfully perform these simulations for sufficiently long times relies on excising a region of the computational domain which includes the singularity and is within the apparent horizon. The dynamics of the collapsing matter is strongly influenced by the initial amount of angular momentum in the progenitor star and, for initial models with sufficiently high angular velocities, the collapse can lead to the formation of an unstable disc in differential rotation.
year | journal | country | edition | language |
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2005-01-01 | Journal of Physics: Conference Series |