Local interstellar gasdynamical stability in spiral arm flow

Details Local interstellar gasdynamical stability in spiral arm flow Local interstellar gasdynamical stability in spiral arm flow

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986inpr.conf..103b&link_type=abstract

In NASA. Ames Research Center Summer School on Interstellar Processes: Abstracts of Contributed Papers p 103-104 (SEE N87-15043

Computer Science

Comparison, Dynamic Stability, Gas Dynamics, Interstellar Gas, Spiral Galaxies, Gas Flow, Potential Flow, Two Dimensional Flow

Scientific paper

The stability of two-dimensional interstellar gas flow passing through a spiral potential has been investigated. The background flow is assumed to move in a tightly wound potential, which may be regarded as external or self-generated. The unperturbed flow, which may be time dependent, is self-gravitating and satisfies the Roberts equations of motion. A polytropic, single-fluid assumption has been used. Magnetic effects are not considered. The motivation behind this work is to try to understand how much of the diversity of spiral arm morphology can be understood by large scale gas dynamical processes alone. To this end, it is suggested that spurring and feathering, and forming molecular cloud complexes may be closely related in the sense of having dynamically similar origins.

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