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| Paper: |
The HH212 Protostar as Observed by ALMA: the Jet, the Cavity, and the Forming Disk |
| Volume: |
499, Revolution in Astronomy with ALMA: The Third Year |
| Page: |
205 |
| Authors: |
Codella, C.; Cabrit, S.; Gueth, F.; Bachiller, R.; Gusdorf, A.; Lefloch, B.; Leurini, S.; Nisini, B.; Podio, L.; Santangelo, G.; Tafalla, M.; Yvart, W. |
| Abstract: |
We report ALMA observations of HH212, a protostar driving a strikingly bipolar H2/SiO collimated jet. We show how ALMA-Band 7 data can trace in unprecedented detail, and within a single spectral set-up, all the crucial ingredients involved in the star-disk formation recipe, namely: (i) the dusty protostar; (ii) the axial jet launched from it; (iii) the biconical outflow and its cavities; (iv) the parent infalling envelope; (v) the forming disk. We reveal different kinematics among chemical tracers, and more asymmetric structures than predicted by simple models, with significant contribution from the rotating swept-up cavity. In particular, we focus on the C17O emission indicating a combination of infall and rotation, with a keplerian disk nested inside |
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