Collisionless kinetic regimes for quasi-stationary axisymmetric accretion disc plasmas

Journal Article · Wed Aug 15 00:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4748578· OSTI ID:22086062

Cremaschini, C ^[1]; Tessarotto, M ^[2]

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1. International School for Advanced Studies (SISSA) and INFN, Trieste (Italy)
2. Department of Mathematics and Geosciences, University of Trieste, Trieste (Italy)

This paper is concerned with the kinetic treatment of quasi-stationary axisymmetric collisionless accretion disc plasmas. The conditions of validity of the kinetic description for non-relativistic magnetized and gravitationally bound plasmas of this type are discussed. A classification of the possible collisionless plasma regimes which can arise in these systems is proposed, which can apply to accretion discs around both stellar-mass compact objects and galactic-center black holes. Two different classifications are determined, which are referred to, respectively, as energy-based and magnetic field-based classifications. Different regimes are pointed out for each plasma species, depending both on the relative magnitudes of kinetic and potential energies and the magnitude of the magnetic field. It is shown that in all cases, there can be quasi-stationary Maxwellian-like solutions of the Vlasov equation. The perturbative approach outlined here permits unique analytical determination of the functional form for the distribution function consistent, in each kinetic regime, with the explicit inclusion of finite Larmor radius-diamagnetic and/or energy-correction effects.

• OSTI ID: 22086062
• Journal Information: Physics of Plasmas, Vol. 19, Issue 8; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCRETION DISKS
AXIAL SYMMETRY
BLACK HOLES
BOLTZMANN-VLASOV EQUATION
COLLISIONLESS PLASMA
CORRECTIONS
DISTRIBUTION FUNCTIONS
GALAXY NUCLEI
LARMOR RADIUS
MAGNETIC FIELDS
MASS
MATHEMATICAL SOLUTIONS
POTENTIAL ENERGY
RELATIVISTIC RANGE