Gravitational instability of interstellar magnetic clouds

Details Gravitational instability of interstellar magnetic clouds Gravitational instability of interstellar magnetic clouds

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.117...89g&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 117, no. 1, Dec. 1985, p. 89-94.

Astronomy and Astrophysics

Astrophysics

Gravitational Effects, Interstellar Gas, Interstellar Magnetic Fields, Magnetic Clouds, Stellar Evolution, Cartesian Coordinates, Schroedinger Equation

Scientific paper

A fourth-order perturbation method is applied to develop a model for the gravitational instability of a gaseous layer threaded by a magnetic field during the process of star formation. A nonlinear Schroedinger equation is defined for the dynamic behavior of interstellar magnetic clouds in an unperturbed state. Conditions which lead to gravitational instability in a gaseous disk are formulated, and a critical wavelength above which waves become unstable is derived. The gravitational instability is linked with a critical mass at which contraction begins. The instability conditions will hold for both spherical and flattened gaseous clouds.

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