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Cosmic ray moderation of the thermal instability
Astronomy and Astrophysics
We apply the Hermite-Bieler theorem in the analysis of the effect of cosmic rays on the thermal stability of an initially uniform, static background. The cosmic rays were treated in a fluid approximation and the diffusion coefficient was assumed to be constant in time and space. The inclusion of cosmic rays does not alter the criterion for the thermal stability of a medium subjected to isobaric perturbations. It does alter the criteria for the stability of a medium perturbed by small amplitudedoi:10.1051/0004-6361:20042138 fatcat:on6ebtkxh5fslhrk743gfdlejy