Virial theorem analysis of the structure and stability of magnetized clouds

Details Virial theorem analysis of the structure and stability of magnetized clouds Virial theorem analysis of the structure and stability of magnetized clouds

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348..186z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 348, Jan. 1, 1990, p. 186-197.

Astronomy and Astrophysics

Astrophysics

8

Gravitational Collapse, Interstellar Magnetic Fields, Magnetic Clouds, Magnetohydrodynamic Stability, Star Formation, Virial Theorem, Interstellar Gas, Magnetic Field Configurations, Molecular Clouds, Spheroids

Scientific paper

The tensor virial theorem is used to analyze the structure and stability of self-gravitating, magnetized spheroids surrounded by a low-density medium with pressure and magnetic field. Analytical expressions are developed for the effect of a weak field and calculate critical states when the effect of the field is arbitrarily strong, comparing the results with full magnetohydrostatic calculations. This analysis suggests that a magnetic field may prevent gravitational collapse but may also be destabilizing, depending on its degree of concentration within the cloud.

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