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Magneto-thermal condensation modes including the effects of charged dust particles

Shadmehri, Mohsen (2009) Magneto-thermal condensation modes including the effects of charged dust particles. Monthly Notices of the Royal Astronomical Society, 385 (2). pp. 985-990. ISSN 0035-8711

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Abstract

We study thermal instability in a magnetized and partially ionized plasma with charged dust particles. Our linear analysis shows that the growth rate of the unstable modes in the presence of dust particles strongly depends on the ratio of the cooling rate and the modified dust-cyclotron frequency. If the cooling rate is less than the modified dust-cyclotron frequency, then growth rate of the condensation modes does not modify due to the existence of the charged dust particles. But when the cooling rate is greater than (or comparable to) the modified dust-cyclotron frequency, the growth rate of unstable modes increases because of the dust particles. Also, wavenumber of the perturbations corresponding to the maximum growth rate shifts to the smaller values (larger wavelengths) as the cooling rate becomes larger than the modified dustcyclotron frequency. We show that growth rate of the condensation modes increases with the electrical charge of the dust particles.

Item Type: Article
Additional Information: Preprint version of published article. The definitive version is available at www3.interscience.wiley.com (DOI: 10.1111/j.1365-2966.2009.14589.x).
Keywords: instabilities; star formation; ISM general; Magneto-thermal condensation; charged dust particles;
Subjects: Science & Engineering > Mathematical Physics
Item ID: 2791
Identification Number: DOI: 10.1111/j.1365-2966.2009.14589.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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