Quick search Find article
Quick search
Find article

Infall and Outflow around the HH 212 Protostellar System

FREE

Chin-Fei Lee1, Paul T. P. Ho2, Henrik Beuther2, Tyler L. Bourke2, Qizhou Zhang2, Naomi Hirano3 and Hsien Shang3

Show affiliations


HH 212 is a highly collimated jet discovered in H2 powered by a young Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. We have mapped around it in 1.33 mm continuum, 12CO (J = 2-1), 13CO (J = 2-1), C18O (J = 2-1), and SO (NJ = 56-45) emission at ~2farcs5 resolution with the Submillimeter Array. A dust core is seen in the continuum around the source. A flattened envelope is seen in C18O around the source in the equator perpendicular to the jet axis, with its inner part seen in 13CO. The structure and kinematics of the envelope can be roughly reproduced by a simple edge-on disk model with both infall and rotation. In this model, the density of the disk is assumed to have a power-law index of p = -1.5 or -2, as found in other low-mass envelopes. The envelope seems dynamically infalling toward the source with slow rotation because the kinematics is found to be roughly consistent with a free fall toward the source plus a rotation of a constant specific angular momentum. A 12CO outflow is seen surrounding the H2 jet, with a narrow waist around the source. Jetlike structures are also seen in 12CO near the source aligned with the H2 jet at high velocities. The morphological relationship between the H2 jet and the 12CO outflow, and the kinematics of the 12CO outflow along the jet axis, are both consistent with those seen in a jet-driven bow shock model. SO emission is seen around the source and the H2 knotty shocks in the south, tracing shocked emission around them.


Subject headings

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


Dates

Issue 1 (2006 March 1)

Received 2005 September 12, accepted for publication 2005 November 1



Users also read

What's this?
This innovative new feature generates a list of articles 'also read' by other users based on them reading the original article. Article abstracts citations and references are all considered and weighted accordingly. We hope that this will help you find relevant papers for your research.

  1. Submillimeter Emission from the Hot Molecular Jet HH 211
  2. Submillimeter Arcsecond-Resolution Mapping of the Highly Collimated Protostellar Jet HH 211
  3. HH 212: Submillimeter Array Observations of a Remarkable Protostellar Jet
More

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.