Physics – Geophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..420m&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 420-421 (SEE N92-10728 01-91)
Physics
Geophysics
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
Scientific paper
A three dimensional Cartesian code was developed to model molecular cloud collapse and protostellar formation. The basic Eulerian scheme employs spatially second-order accurate, finite difference methods to advance the fluid variables in time. The hydrodynamic equations governing the collapse include the effects of self-gravity, 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.
Kaula William M.
Myhill E. M.
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