Modified Jeans Instability for Dust Grains in a Plasma

Details Modified Jeans Instability for Dust Grains in a Plasma Modified Jeans Instability for Dust Grains in a Plasma

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvl..94q5005d&link_type=abstract

Physical Review Letters, vol. 94, Issue 17, id. 175005

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12

Dusty Or Complex Plasmas, Plasma Crystals, Other Linear Waves, Dust Processes

Scientific paper

An investigation of the properties of linear stability is conducted for a system consisting of particles having mass m and charge q, interacting through the gravitational and electrostatic force (Jeans instability). However, in light of recent works showing that dust particles in a plasma can have a Lennard-Jones-like shielding potential, a new set of equations has been derived, where the electrostatic interaction among the dust particles is Lennard-Jones-like instead of Coulomb-like. A new condition for the gravitational instability is derived, showing a broader spectrum of unstable modes with faster growth rates.

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