6533b85efe1ef96bd12bfc26
RESEARCH PRODUCT
A "horizon adapted" approach to the study of relativistic accretion flows onto rotating black holes
José Ma. IbáñezJosé A. FontPhilippos Papadopoulossubject
PhysicsEvent horizonComputationAstrophysics::High Energy Astrophysical PhenomenaCoordinate systemAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsGeneral Relativity and Quantum Cosmology (gr-qc)AstrophysicsAccretion (astrophysics)General Relativity and Quantum CosmologyGeneral Relativity and Quantum CosmologyClassical mechanicsSpace and Planetary Sciencedescription
We present a new geometrical approach to the study of accretion flows onto rotating (Kerr) black holes. Instead of Boyer-Lindquist coordinates, the standard choice in all existing numerical simulations in the literature, we employ the simplest example of a horizon adapted coordinate system, the Kerr-Schild coordinates. This choice eliminates boundary ambiguities and unphysical divergent behavior at the event horizon. Computations of Bondi-Hoyle accretion onto extreme Kerr black holes, performed here for the first time, demonstrate the key advantages of this procedure. We argue it offers the best approach to the numerical study of the, observationally, increasingly more accesible relativistic inner region around black holes.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-05-20 |