Abstract
We present a self-similar circulation model for protostellar bipolar
outflows. The model is axisymmetric and stationary, and now includes
Poynting flux. An inflow/outflow pattern including collimation of high
speed material and an infalling toroidal disc arises naturally. The
model is now at a stage where synthetic CO spectra reproduce very well
the observational features. The results strengthen the idea that the
Poynting flux and the radiative heating are ultimately the energy
sources driving the outflow. We also show time-dependent numerical
models of MHD jets driven by different magneto-centrifugal launching
mechanisms. Our initial conditions for the simulations were calculated
by solving for transfield force balance in jets driven by disks with
different properties. The cross sections of density, velocity, pressure
and magnetic field from these models are then injected into a
computational grid. Using a high order accurate MHD code we show that
the propagation characteristics of jets driven by different classes of
rotators can vary considerably in terms of shock dynamics, kinematics
and morphology. Our results may provide a mean for distinguishing
between different models of jet launching and collimation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 291-292 |
| Journal | Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyama Radio Observatory |
| State | Published - Dec 1 1999 |
| Externally published | Yes |