SMA Observations Of A Remarkable Protostellar Jet HH 212

Details SMA Observations Of A Remarkable Protostellar Jet HH 212 SMA Observations Of A Remarkable Protostellar Jet HH 212

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21012303l&link_type=abstract

American Astronomical Society Meeting 210, #123.03; Bulletin of the American Astronomical Society, Vol. 39, p.331

Astronomy and Astrophysics

Astronomy

Scientific paper

HH 212 is a nearby (460 pc) protostellar jet discovered in H2 powered by a Class 0 source, IRAS 05413-0104. We have mapped it in 850 um continuum, SiO (J=8-7), CO (J=3-2), SO (J=9_8-8_7), HCO+ (J = 4-3), and H13CO+ (J = 4-3) emission simultaneously at 1" resolution with the Submillimeter Array (SMA). Thermal dust emission is seen in continuum around the source, mainly arising from an inner envelope and a possible disk. The inner envelope is also seen with rotation in CO, HCO+, and probably SO. Like H2 emission, CO and SiO emission are seen along the jet axis but extending closer to the source, tracing the bow shocks and the continuous structures in between. SO emission is seen forming a jetlike structure extending from the source, likely tracing the jet near the launching region. The jet is episodic and bending. It may also be slightly precessing. A hint of jet rotation is also seen across the jet axis. Internal outflow shells are seen in CO and HCO+, associated with the bow shocks in the inner part of the jet. The bases of the HCO+ shells are seen with a hint of rotation, probably consisted mainly of the material extended from the inner envelope and even the possible disk. The bases of the outflow shells are also seen in H13CO+ and even the continuum, probably tracing the dense material extended from around the same regions.

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