V. C. A. Ferraro:Journ. Geophys. Res.,57, 15 (1952).
V. C. A. Ferraro:Proc. Roy. Soc.,233, 310 (1955);J. H. Adlam andJ. E. Allen:Phil. Mag.,3, 448 (1958);L. Davis, R. Lust andA. Schluter:Zeits. Naturforsch.,13 a, 916 (1958);P. G. Saffman:Journ. Fluid Mech.,11, 16 (1961).
We are offering the above assertion in a loose sense since the particle density of the solar wind is of the order 10 per cm3, whereas one assigns temperatures of the order 105 ÷ 106 degrees in order to calculate collision mean free paths of the order of astronomical units. (R. H. Levy, H. E. Petschek andG. L. Siscoe:A.I.A.A. Journ.,2, 2065 (1965).)
N. A. Chernikov:Acta Phys. Polon.,23, 629 (1963);R. W. Lindquist:Ann. of Phys.,37, 487 (1966). Additional references may be found in the above papers.
For a discussion of the invariant distribution function, see alsoJ. L. Synge:Relativity, the General Theory (Amsterdam, 1960).
G. E. Tauber andJ. W. Weinberg:Phys. Rev.,122, 1342 (1961);K. Bichteler:Commun. Math. Phys.,4, 352 (1967).
The integral in eq. (2) could also have been written with an invariant three-dimensional volume element and a reduced distribution function. The latter is what results from integrating out the delta-function in eq. (2), which is the form used in ref. (4,5).
A. Lichnerowicz:Relativistic Hydrodynamics and Magnetohydrodynamics (New York, 1967).