Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aspc..160...81n&link_type=abstract
Astrophysical Discs - An EC Summer School, Astronomical Society of the Pacific, Conference series Vol #160, Edited by J. A. Sell
Astronomy and Astrophysics
Astrophysics
2
Scientific paper
We present a study of the Bardeen-Petterson effect using SPH simulations to calculate accretion disc models in the vicinity of a rotating black hole. The disc dynamics are controlled by bending wave propagation, or by diffusion, so we begin by studying bending wave propagation in Keplerian discs. We compare simulation results with solutions of the linearized problem obtained using finite difference equations, which enables us to calibrate the code viscosity. Our simulations of the Bardeen-Petterson effect explore a range of disc parameters, and we calculate the transition radius out to which the disc angular momentum vector is aligned with that of the black hole. For the parameter range investigated, the transition radius is always found to be much smaller than that obtained by Bardeen & Petterson (1975), because of the role of pressure effects in the simulations.
Nelson Richard P.
Papaloizou John C. B.
Terquem Caroline
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