Physics
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phpl...12h2902c&link_type=abstract
Physics of Plasmas, Volume 12, Issue 8, pp. 082902-082902-7 (2005).
Physics
3
Dusty Or Complex Plasmas, Plasma Crystals, Magnetohydrodynamic Waves, Macroinstabilities, Magnetized Plasmas, Magnetohydrodynamics And Plasmas, Molecular Clouds, H2 Clouds, Dense Clouds, And Dark Clouds, Origin, Formation, Evolution, Age, And Star Formation
Scientific paper
The effects of self-gravity of a dusty plasma on the Alfvén and compressive resonance absorption processes are investigated. Instead of questions on the stability of waves in a gravitating plasma, which leads to the Jeans instability, we investigate the spatial behavior of the fields of a wave of real frequency, in a magnetized, self-gravitating, dusty plasma, in which the Alfvén and compressive resonances are encountered. The equilibrium state of the system is discussed, next the resonance process at frequencies much lower than the dust-cyclotron frequency, then resonance at frequencies comparable to the cyclotron frequency. It is found that self-gravity can lead to considerable modification of the resonance processes, with removal of the resonances in some circumstances. These results are applicable to interstellar clouds and star-formation regions.
Cramer Neil F.
Verheest Frank
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