A study of radial self-similar non-relativistic MHD outflow models:
  parameter space exploration and application to the water fountain W43A
  Outflows, spanning a wide range of dynamical properties and spatial
extensions, have now been associated with a variety of accreting astrophysical
objects, from supermassive black holes at the core of active galaxies to young
stellar objects. The role of such outflows is key to the evolution of the
system that generates them, for they extract a fraction of the orbiting
material and angular momentum from the region close to the central object and
release them in the surroundings. The details of the launching mechanism and
their impact on the environment are fundamental to understand the evolution of
individual sources and the similarities between different types of
outflow-launching systems. We solve semi-analytically the non-relativistic,
ideal, magnetohydrodynamics (MHD) equations describing outflows launched from a
rotating disk threaded with magnetic fields using our new numerical scheme. We
present here a parameter study of a large sample of new solutions. We study the
different combinations of forces that lead to a successfully launched jet and
discuss their global properties. We show how these solutions can be applied to
the outflow of the water fountain W43A for which we have observational
constraints on magnetic field, density and velocity of the flow at the location
of two symmetrical water maser emitting regions.
