ALMA discovery of a rotating SO/SO2 flow in HH212
PINEAU DES FORÊTS, G.
Institut d'astrophysique spatiale [IAS]
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
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Institut d'astrophysique spatiale [IAS]
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
Language
en
Article de revue
This item was published in
Astronomy and Astrophysics - A&A. 2017-11, vol. 607, p. L6
EDP Sciences
English 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 ...Read more >
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%.Read less <
English Keywords
stars: formation
ISM: jets and outflows
ISM: individual objects: HH212
Origin
Hal imported