Helical Flows and Rotation in Protostellar Jets

Details Helical Flows and Rotation in Protostellar Jets Helical Flows and Rotation in Protostellar Jets

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9164w&link_type=abstract

HST Proposal ID #9164

Physics

Hst Proposal Id #9164 Star Formation

Scientific paper

We propose to study the velocity structure of protostellar jets transverse to the jet flow axis through 2-D long-slit STIS spectroscopy. In particular, HST resolution would allow the search for rotation, e.g. a helical flow pattern, around the axis of an optical jet. Such a detection would provide strong evidence that jets act as outflowing channels for angular momentum, thus allowing infalling material to fully accrete onto the protostar. A study of the kinematics across the jet axis would also provide a discriminating test for different jet flow models and processes such as precession, flows along toroidal magnetic field lines, X-wind wide-angle flows, and Kelvin-Helmholtz shear instabilities. Mapping the transverse flow kinematics in protostellar jets will provide important information for star formation and may also provide clues for understanding propagation effects in AGN jets.

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