ALMA discovery of a rotating SO/SO2 flow in HH212

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 wi...

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Veröffentlicht in:Astronomy and astrophysics (Berlin) 2017-11, Vol.607
Hauptverfasser: Tabone, B., Cabrit, S., Bianchi, E., Ferreira, J., Pineau des Forêts, G., Codella, C., Gusdorf, A., Gueth, F., Podio, L., Chapillon, E.
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Sprache:eng
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Zusammenfassung: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%.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/201731691