Statistics – Computation
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...139..378b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 139, no. 2, Oct. 1984, p. 378-388.
Statistics
Computation
31
Gravitational Collapse, Interstellar Magnetic Fields, Magnetic Clouds, Molecular Clouds, Rotating Plasmas, Stellar Models, Three Dimensional Models, Angular Momentum, Astronomical Models, Computational Astrophysics, Isothermal Flow, Jeans Theory, Magnetohydrodynamics, Mass Spectra, Three Dimensional Flow
Scientific paper
The author presents results of 3D numerical calculations on the collapse of rotating magnetized isothermal gas clouds. The magnetic field is assumed to remain "frozen in" to the gas. In order to solve the MHD equations the author uses the "smoothed particles" hydrodynamics approach, using 500 particles. He finds that a magnetic field strongly prevents the cloud from collapsing and that in the case of the perpendicular rotator differential rotating nonhomologous bar-like structures are formed. In the cases without magnetic field merged particles are sufficiently numerous to allow the determination of a mass spectrum, angular momentum as a function of mass and the distribution of the orientation of individual angular momenta. The dependence on initial conditions of these quantities is shown to be very small.
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