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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28362
Title: A 100 au Wide Bipolar Rotating Shell Emanating from the HH 212 Protostellar Disk: A Disk Wind?
Authors: Lee, Chin-Fei
Li, Zhi-Yun
CODELLA, CLAUDIO 
Ho, Paul T. P.
PODIO, LINDA 
Hirano, Naomi
Shang, Hsien
Turner, Neal J.
Zhang, Qizhou
Issue Date: 2018
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 856
Issue: 1
First Page: 14
Abstract: HH 212 is a Class 0 protostellar system found to host a “hamburger”-shaped dusty disk with a rotating disk atmosphere and a collimated SiO jet at a distance of ∼400 pc. Recently, a compact rotating outflow has been detected in SO and SO<SUB>2</SUB> toward the center along the jet axis at ∼52 au (0.″13) resolution. Here we resolve the compact outflow into a small-scale wide-opening rotating outflow shell and a collimated jet, with the observations in the same S-bearing molecules at ∼16 au (0.″04) resolution. The collimated jet is aligned with the SiO jet, tracing the shock interactions in the jet. The wide-opening outflow shell is seen extending out from the inner disk around the SiO jet and has a width of ∼100 au. It is not only expanding away from the center, but also rotating around the jet axis. The specific angular momentum of the outflow shell is ∼40 au km s<SUP>-1</SUP>. Simple modeling of the observed kinematics suggests that the rotating outflow shell can trace either a disk wind or disk material pushed away by an unseen wind from the inner disk or protostar. We also resolve the disk atmosphere in the same S-bearing molecules, confirming the Keplerian rotation there.
URI: http://hdl.handle.net/20.500.12386/28362
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aaae6d
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aaae6d
Bibcode ADS: 2018ApJ...856...14L
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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