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http://hdl.handle.net/20.500.12386/28362
Titolo: | A 100 au Wide Bipolar Rotating Shell Emanating from the HH 212 Protostellar Disk: A Disk Wind? | Autori: | Lee, Chin-Fei Li, Zhi-Yun CODELLA, CLAUDIO Ho, Paul T. P. PODIO, LINDA Hirano, Naomi Shang, Hsien Turner, Neal J. Zhang, Qizhou |
Data pubblicazione: | 2018 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 856 | Fascicolo: | 1 | Da pagina:: | 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 |
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