The Effects of Magnetic Fields on Radiative Cooling Jets

Abstract

We here review the results of recent studies of magnetic field effects on the structure and evolution of overdense, radiatively cooling, steady and pulsed jets, which were carried out with the help of fully three-dimensional MHD simulations. Three initial magnetic field topologies are considered: (i) a helical and (ii) a longitudinal field, both of which permeate the jet and the ambient medium, and (iii) a pure toroidal field in the jet. Using a set of parameters that is particularly appropriate to protostellar jets, we examine the emission structure of the internal knots and the leading working surface, comparing our results with a nonmagnetic baseline and also with 2-D MHD calculations.