Kinetic axi-symmetric gravitational equilibria in collisionless accretion disc plasmas

Details Kinetic axi-symmetric gravitational equilibria in collisionless accretion disc plasmas Kinetic axi-symmetric gravitational equilibria in collisionless accretion disc plasmas

2010-01-18

arxiv.org/abs/1001.3089v2

Physics

Plasma Physics

13 pages, 1 figure Accepted for publication in Physics of Plasmas

Scientific paper

A theoretical treatment is presented of kinetic equilibria in accretion discs around compact objects, for cases where the plasma can be considered as collisionless. The plasma is assumed to be axi-symmetric and to be acted on by gravitational and electromagnetic fields; in this paper, the particular case is considered where the magnetic field admits a family of toroidal magnetic surfaces, which are locally mutually-nested and closed. It is pointed out that there exist asymptotic kinetic equilibria represented by generalized bi-Maxwellian distribution functions and characterized by primarily toroidal differential rotation and temperature anisotropy. It is conjectured that kinetic equilibria of this type can exist which are able to sustain both toroidal and poloidal electric current densities, the latter being produced via finite Larmor-radius effects associated with the temperature anisotropy. This leads to the possibility of existence of a new kinetic effect - referred to here as a \textquotedblleft kinetic dynamo effect\textquotedblright\ - resulting in the self-generation of toroidal magnetic field even by a stationary plasma, without any net radial accretion flow being required. The conditions for these equilibria to occur, their basic theoretical features and their physical properties are all discussed in detail.

Affiliated with

Also associated with

No associations

Rating

Kinetic axi-symmetric gravitational equilibria in collisionless accretion disc plasmas does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kinetic axi-symmetric gravitational equilibria in collisionless accretion disc plasmas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetic axi-symmetric gravitational equilibria in collisionless accretion disc plasmas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-661407