Statistics – Computation
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...83..311b&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 83, no. 2, p. 311-327.
Statistics
Computation
84
Gravitational Collapse, Hydrodynamics, Molecular Clouds, Protostars, Star Formation, Computational Astrophysics, Poisson Equation, Spherical Coordinates
Scientific paper
Two related numerical schemes for calculating the 3D collapse of protostellar clouds are defined, developed, and checked on a wide variety of test problems in spherical symmetry and multiple dimensions. One scheme is first-order accurate in time (code S), and the other second-order accurate in time (code ST). Through convergence testing, the codes are shown to be second-order accurate in spatial differences. Compared with the previous 3D code, the combination of reduced numerical dissipation through second-order accuracy and of removing the systematic bias toward central concentrations implies that the tendency for fragmentation into binary or multiple protostars should increase. A reinvestigation of fragmentation as a mechanism for forming binary stars is expected to yield an even more favorable evaluation.
Boss Alan P.
Myhill Elizabeth A.
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