Criteria for fragmentation in a collapsing rotating cloud

Details Criteria for fragmentation in a collapsing rotating cloud Criteria for fragmentation in a collapsing rotating cloud

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242..209b&link_type=abstract

Astrophysical Journal, Part 1, vol. 242, Nov. 15, 1980, p. 209-218. Research supported by the Max-Planck-Institut für Astrophys

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84

Gravitational Collapse, Protostars, Stellar Evolution, Astronomical Maps, Computerized Simulation, Isothermal Processes, Stellar Rotation

Scientific paper

The isothermal collapse of a rotating protostar with pressure and self-gravity is calculated by a hydrodynamic computer code that treats three space dimensions. A number of initial conditions are tested to determine the conditions under which a cloud is unstable to fragmentation. It is shown that fragmentation does not proceed to a significant extent during the first free-fall time, but that in most cases fragmentation has occurred by 1.5 to 2 times the initial free-fall time. The extent to which the density in the fragments is enhanced over that in their surroundings on this time scale depends on the initial ratio of thermal to gravitational energy, but is only weakly dependent on the type and amplitude of the perturbation and on the initial rotational energy.

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