Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-07-23
Astronomy and Astrophysics
Astrophysics
Accepted for publications in MNRAS; 8 pages, 12 figures. Postscript figures available from the authors
Scientific paper
We have performed three-dimensional numerical simulations of accretion discs in a close binary system using the Smoothed Particle Hydrodynamics method. Our result show that, contrary to previous claims, 3D discs do exist even when the specific heat ratio of the gas is as large as gamma=1.2. Although the disc is clearly more spread in the z-direction in this case than it is for the quasi-isothermal one, the disc height is compatible with the hydrostatic balance equation. Our numerical simulations with gamma=1.2 also demonstrate that spiral shocks exist in 3D discs. These results therefore confirm previous 2D simulations.
Boffin Henri. M. J.
Matsuda Takuya
Yukawa Hiroshi
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