## Appendix A: another analytical solution with degenerate light cylinderHere we give the analytical expression for the field pressure and flux distribution for a solution with and a bounded current distribution (22) with , The field rotation law can be expressed by an implicit equation Suppose that we have Keplerian rotation of the foot points along the disk, , it follows for the disk flux distribution where . For the 'total expansion rate' of the jet we derive an implicit equation © European Southern Observatory (ESO) 1997 Online publication: May 26, 1998 |