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ALMA discovery of a rotating SO/SO2 flow in HH212. A possible MHD disk wind?

Journal
Date Issued
2017
Author(s)
Tabone, B.
•
Cabrit, S.
•
Bianchi, E.
•
Ferreira, J.
•
Pineau des Forêts, G.
•
•
Gusdorf, A.
•
Gueth, F.
•
•
Chapillon, E.
DOI
Abstract
We wish to constrain the possible contribution of a magnetohydrodynamic disk wind (DW) to the HH212 molecular jet. We mapped the flow base with ALMA Cycle 4 at 0.̋13 60 au resolution and compared these observations with synthetic DW predictions. We identified, in SO/SO2, a rotating flow that is wider and slower than the axial SiO jet. The broad outflow cavity seen in C34S is not carved by a fast wide-angle wind but by this slower agent. Rotation signatures may be fitted by a DW of a moderate lever arm launched out to 40 au with SiO tracing dust-free streamlines from 0.05-0.3 au. Such a DW could limit the core-to-star efficiency to ≤50%.
Volume
607
Start page
L6
Uri
Url
Issn Identifier
0004-6361
Ads BibCode
2017A&A...607L...6T
Rights
open.access
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