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Thermal instability with the effect of cosmic-ray diffusion

Shadmehri, Mohsen (2009) Thermal instability with the effect of cosmic-ray diffusion. Monthly Notices of the Royal Astronomical Society, 397 (3). pp. 1521-1527. ISSN 0035-8711

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Abstract

We study dynamical effects of cosmics rays (CRs) on the thermal instability in the linear regime. CRs and the thermal plasma are treated as two different interacting fluids, in which CRs can diffuse along the magnetic field lines. We show that growth rate of the magnetothermal condensation mode is reduced because of the existence of CRs and this stabilizing effect depends on the diffusion coefficient and the ratio of the CRs pressure to gas pressure. Thus, a slower rate of structure formation via thermal instability is predicted when CRs are considered.

Item Type: Article
Additional Information: Preprint version of published article. The definitive version is available at www3.interscience.wiley.com (DOI: 10.1111/j.1365-2966.2009.15047.x).
Keywords: cosmic ray instabilities; star formation; Thermal instability; cosmic-ray diffusion; ISM;
Subjects: Science & Engineering > Mathematical Physics
Item ID: 2790
Identification Number: DOI: 10.1111/j.1365-2966.2009.15047.x
Depositing User: Mohsen Shadmehri
Date Deposited: 25 Oct 2011 14:00
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Wiley Blackwell
Refereed: No
URI:

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