Quick search Find article
Quick search
Find article

HH 212: Submillimeter Array Observations of a Remarkable Protostellar Jet

FREE ISSUE

Chin-Fei Lee1,2, Paul T. P. Ho2,3, Naomi Hirano2, Henrik Beuther4, Tyler L. Bourke3, Hsien Shang2 and Qizhou Zhang3

Show affiliations


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 μm continuum, SiO(J = 8-7), CO(J = 3-2), SO(NJ = 89-78), HCO+(J = 4-3), and H13CO+(J = 4-3) emission simultaneously at ~1'' resolution with the Submillimeter Array. 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 and HCO+, and probably in 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 consisting mainly of the material extending 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 extending from around the same regions.


Subject headings

ISM: individual (HH 212); ISM: jets and outflows; stars: formation


Dates

Issue 1 (2007 April 10)

Received 2006 September 25, accepted for publication 2007 January 5



View by subject




Export








Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.