Fragmentation in stellar collapse
Abstract
A three dimensional Cartesian code was developed to model molecular cloud collapse and protostellar formation. The basic Eulerian scheme employs spatially secondorder accurate, finite difference methods to advance the fluid variables in time. The hydrodynamic equations governing the collapse include the effects of selfgravity, rotation, and radiative transfer. Supplementary equations include Poisson's equation which relates the gravitational potential to the density distribution and a mean intensity equation derived with the Eddington approximation for radiative transfer. The gas pressures and internal energies are determined from equations of state derived for a molecular cloud composed of hydrogen, helium, and heavier elements.
 Publication:

A Bibliography of Planetary Geology and Geophysics Principal Investigators and their Associates, 1990  1991
 Pub Date:
 June 1991
 Bibcode:
 1991pggp.rept..420M
 Keywords:

 Astronomical Models;
 Cartesian Coordinates;
 Finite Difference Theory;
 Fragmentation;
 Gravitational Collapse;
 Hydrodynamic Equations;
 Molecular Clouds;
 Protostars;
 Stellar Evolution;
 Three Dimensional Models;
 Density Distribution;
 Eddington Approximation;
 Equations Of State;
 Euler Equations Of Motion;
 Gas Pressure;
 Gravitational Fields;
 Helium;
 Hydrogen;
 Poisson Equation;
 Radiative Transfer;
 Astrophysics