Wagner, A.Y., Falle, S.A.E.G., Hartquist, T.W. and Pittard, J.M. (2005) Cosmic ray moderation of the thermal instability. Astronomy and Astrophysics, 430 (2). pp. 567-569. ISSN 0004-6361
Available under licence : See the attached licence file.
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 amplitude sound waves. In the limit of a high background cosmic ray pressure to thermal pressure ratio, the instability in response to high frequency sound waves is suppressed.
|Copyright, Publisher and Additional Information:||© ESO 2005|
|Keywords:||ISM, kinematics, dynamics, cosmic rays, hydrodynamics, instabilities|
|Institution:||The University of Leeds|
|Academic Units:||The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds)
The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds)
|Depositing User:||Repository Assistant|
|Date Deposited:||02 Jun 2006|
|Last Modified:||08 Jun 2014 06:17|