Towards steady-state solutions for supersonic wind accretion on to gravitating objects

Details Towards steady-state solutions for supersonic wind accretion on to gravitating objects Towards steady-state solutions for supersonic wind accretion on to gravitating objects

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.313..198p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 313, Issue 1, pp. 198-208.

Physics

16

Accretion, Accretion Discs, Black Hole Physics, Hydrodynamics, Instabilities, Shock Waves, Methods: Numerical

Scientific paper

We discuss the results of a numerical simulation of the hydrodynamic Bondi-Hoyle accretion obtained on the basis of a high-resolution numerical scheme with the proper entropy correction procedure necessary to avoid the `weak' non-monotonicity intrinsic in these schemes. Both the axisymmetric and plane cases are considered. The axisymmetric accretion problem turns out to have steady-state solutions for all determining parameters. Steady-state solutions for the plane accretion are found in certain cases even for sinusoidally perturbed and strongly non-uniform winds. Non-stationary phenomena do exist but they are not very violent and can sometimes be attributed as well to numerical as to physical reasons.

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