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Title:
The stabilizing effects of cloud reacceleration; Microturbulence, and rotation on Parker's instability
Authors:
Zweibel, E. G.; Kulsrud, R. M.
Affiliation:
AA(Princeton University, New Observatory, Princeton, N.J.), AB(Princeton University, New Observatory, Princeton, N.J.)
Publication:
Astrophysical Journal, vol. 201, Oct. 1, 1975, pt. 1, p. 63-73. (ApJ Homepage)
Publication Date:
10/1975
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cloud Physics, Cosmic Rays, Galactic Evolution, Galactic Rotation, Interstellar Gas, Interstellar Magnetic Fields, Astronomical Models, Coriolis Effect, Faraday Effect, Galactic Radiation, Interstellar Matter, Magnetohydrodynamics
DOI:
10.1086/153858
Bibliographic Code:
1975ApJ...201...63Z

Abstract

Parker's instability is reconsidered with the inclusion of a model equation of state for the gas of interstellar clouds, a tangled interstellar field, and galactic rotation. It is found that the instability is stabilized for most choices of interstellar parameters consistent with observation. For the remaining choices which can lead to instability, the growth time is longer than 100 million years. It is concluded that the instability can have little to do with cosmic-ray escape and probably cannot destroy a primordial galactic field.

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Database: Astronomy
Physics
arXiv e-prints