Exact solution of two fluid plasma equations for the creation of jet-like flows and seed magnetic fields in cylindrical geometry

Abstract

An exact solution of two fluid ideal classical plasma equations is presented which shows that the jet-like outflow and magnetic field are generated simultaneously by the density and temperature gradients of both electrons and ions. Particular profiles of density function $\psi=\ln \bar{n}$ (where $\bar{n}$ is normalized by some constant density $N_0$) and temperatures $T_j$ (for $j=e,i)$ are chosen which reduce the set of nonlinear partial differential equations to two simple linear equations generating longitudinally uniform axial outflow and magnetic field in cylindrical geometry in several astrophysical objects. This mechanism also seems to be operative for producing short scale plasma jets in the solar atmosphere in the form of spicules and flares. The presented solution requires particular profiles of density and temperatures, but it is a natural solution of the two fluid ideal classical plasma equations. Similar jet-like outflows can be generated by the density and temperature gradients in neutral fluids as well.