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Title: Statistical mechanics of velocity and magnetic fields in solar active regions
Authors: Krishan, V
Keywords: Turbulence;Coronal Loops;Magnetohydrodynamic;Solar Activity;Solar Magnetic Field;Solar Velocity;Statistical Mechanics;Distribution Functions;Incompressible Fluids
Issue Date: Feb-1985
Publisher: Springer
Citation: Solar Physics, Vol. 95, No. 2, pp. 269 - 280
Abstract: A statistical mechanics of the velocity and magnetic fields is formulated for an active region plasma. The plasma subjected to the conservation laws emerges in a most probable state which is described by an equilibrium distribution function containing a lagrange multiplier for every invariant of the system. The lagrange multipliers are determined by demanding that the measured expectation values of the invariants be reproduced. For a numerical exercise, we have assumed some probable values for these invariants. The total energy of a coronal loop is estimated from energy balance considerations. Doppler widths of the UV and EUV lines excited in the coronal loop plasma give a measure of the root-mean-square velocities. Measurements of magnetic helicity are not available for the solar corona.
ISSN: 0038-0938
Appears in Collections:IIAP Publications

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