The Class 0 Outflow Hammered Out?

  • Michael D. Smith
  • Roland Völker
  • Gerhard Suttner
  • Harold W. Yorke
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 182)

Abstract

Dense molecular jets cutting through dense molecular clouds are simulated here using a ZEUS-type hydrodynamics code extended with molecular physics. H2 ‘hot snapshots’ and CO ‘historical views’ are nicely modelled with overdense uniform jets. Attention is drawn to some remaining hot problems: observed jet knots are bow shaped, bipolar outflows can be highly asymmetric, some proper motions within jets are enigmatically low and H2 excitation can be exceedingly uniform.

We present the Hammer Jet, in which the nozzle introduces high velocity variations, as well as a strong ripping and spray action. Prominent jet bow shocks in H2 and CO emission lines are then produced. Wide tubular CO structures with concave bases show up. Proper motions are simulated. The asymmetries are modelled by jet break-out from a molecular core into a diffuse atomic environment.

Keywords

Proper Motion Pattern Speed Radial Speed Molecular Core Fluid Speed 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • Michael D. Smith
    • 1
  • Roland Völker
    • 1
  • Gerhard Suttner
    • 1
  • Harold W. Yorke
    • 1
  1. 1.Astronomisches Institut der Universität Würzburg Am HublandWürzburgGermany

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