Magnetic reconnection in inertial regimes

Magnetic field line reconnection in high temperature plasmas is one of the frontier problems in plasma physics due to its relevance to astrophysical and laboratory plasmas. In such a plasma Coulomb collisions are very infrequent, and represent therefore, an inefficient mechanism for breaking magnetic field lines. It is known, on the other hand, that plasma currents can be limited by non-dissipative effects, such as the inertia of the electrons. Here we review the major results in the analysis of magnetic reconnection in inertial regimes obtained on the basis of a four-field two-fluid models.