Thermal instability of an expanding dusty plasma with equilibrium cooling

Details Thermal instability of an expanding dusty plasma with equilibrium cooling Thermal instability of an expanding dusty plasma with equilibrium cooling

2007-06-28

arxiv.org/abs/0706.4221v1

Physics

Plasma Physics

23 pages, 14 figures

Scientific paper

10.1063/1.2907374

We present an analysis of radiation induced instabilities in an expanding plasma with considerable presence of dust particles and equilibrium cooling. We have shown that the equilibrium expansion and cooling destabilize the radiation condensation modes and the presence of dust particles enhances this effect. We have examined our results in the context of ionized, dusty-plasma environments such as those found in planetary nebulae (PNe). We show that due to the non-static equilibrium and finite equilibrium cooling, small-scale localized structures formed out of thermal instability, become transient, which agrees with the observational results. The dust-charge fluctuation is found to heavily suppress these instabilities, though in view of non-availability of convincing experimental data, a definitive conclusion could not be made.

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