On the search of the magnetic precursor of C-type shocks in young molecular outflows

Details On the search of the magnetic precursor of C-type shocks in young molecular outflows On the search of the magnetic precursor of C-type shocks in young molecular outflows

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atnf.prop.1595j&link_type=abstract

ATNF proposal M326, Semester: April, 2008

Physics

Galactic, Mopra

Scientific paper

The detection of very narrow SiO emission at almost ambient cloud velocities and of the ion enhancement toward the young shocks of the L1448-mm outflow, have been proposed to be signatures of the magnetic precursor of C-shocks. Although recent theoretical modelling predicts that the expected SiO emission arising from the precursor has narrow line profiles and is centered at almost ambient velocities, L1448-mm is so far the only object where this emission has been detected. We propose to observe a sample of 30 young molecular outflows (t<5×10E4yrs) in the southern hemisphere (delta<-10°) in order to clearly establish if the narrow SiO emission and the ion enhancement constitute fingerprints of the magnetic precursor interaction. This will help us to locate the regions where the jet is impinging in the ambient gas, providing information about the evolution of jet-driven molecular outflows.

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