The collapse of cylindrical isothermal and polytropic clouds with rotation

Details The collapse of cylindrical isothermal and polytropic clouds with rotation The collapse of cylindrical isothermal and polytropic clouds with rotation

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374..610b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 374, June 20, 1991, p. 610-622. NSERC-supported research.

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Gravitational Collapse, Isothermal Processes, Molecular Clouds, Polytropic Processes, Star Formation, Stellar Rotation, Astronomical Models, Computational Astrophysics, Hydrodynamics, Jeans Theory

Scientific paper

Two-dimensional numerical hydrodynamic calculations are carried out to study the effect of the geometry on the process of gravitational collapse of a rotating axisymmetric cloud. Both polytropic and isothermal equations of state are used in the analysis. It is shown that the shape of a cloud undergoing collapse is the dominant factor in all cases, except where the polytropic constant is large (greater than 4/3). Without rotation, clouds differing from a uniform geometry collapse more readily, while the rotating oblate clouds require a larger initial Jeans number than either clouds with L/D = 1 or prolate clouds.

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