Three-Dimensional MHD Simulations of Self-Gravitating Magnetized Gas Layer Under External Pressure View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1999

AUTHORS

Michihisa Umekawa , Ryoji Matsumoto

ABSTRACT

Pressure bounded gaseous slab plays important roles in sequential star formation in molecular clouds (Elmegreen and Elmegreen 1978). Through three-dimensional numerical simulations, we studied the effects of external pressure and magnetic fields on the stability of the gaseous slab. By two-dimensional nonlinear simulations of self-gravitating gaseous slab, we found: (l)When the external pressure is low, the gaseous slab fragments into collapsing high density clumps due to the Jeans instability. (2)When the external pressure is comparable to the mid-plane pressure of the slab, incompressible mode instability (Lubow and Pringle 1993) dominates. (3)Jeans stable clouds created by the above mechanism can merge by mutual gravitational attraction. Once the cloud mass exceeds the Jeans mass, the cloud collapses and leads to star formation. More... »

PAGES

121-122

Book

TITLE

Numerical Astrophysics

ISBN

978-94-010-6008-0
978-94-011-4780-4

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-94-011-4780-4_42

DOI

http://dx.doi.org/10.1007/978-94-011-4780-4_42

DIMENSIONS

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