ALMA discovery of a rotating SO/SO$_2$ flow in HH212. A possible MHD disk wind?

Abstract : We wish to put tight constraints on the possible contribution of an MHD disk wind (DW) to the HH212 molecular jet. We use ALMA Cycle 4 to map the inner outflow at $0.13" \sim$ 60~au resolution, and compare with synthetic predictions for DW models. We identify in SO/SO$_2$ a rotating flow wider and slower than the axial SiO jet. The broad outflow cavity seen in C$^{34}$S is not carved by a fast wide-angle wind but by this slower agent. Rotation signatures may be fitted by a DW of moderate lever arm launched out to $\sim$ 40 au, with SiO tracing dust-free streamlines from 0.05-0.3 au. If indeed a DW, it could limit the core-to-star efficiency to $\leq 50\%$.
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Astronomy and Astrophysics - A&A, EDP Sciences, 2017
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https://hal.archives-ouvertes.fr/hal-01612954
Contributeur : Marie-Paule Pomies <>
Soumis le : lundi 9 octobre 2017 - 09:03:23
Dernière modification le : lundi 10 décembre 2018 - 01:24:41

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B. Tabone, S. Cabrit, E. Bianchi, Jorge Ferreira, G. Pineau Des Forêts, et al.. ALMA discovery of a rotating SO/SO$_2$ flow in HH212. A possible MHD disk wind?. Astronomy and Astrophysics - A&A, EDP Sciences, 2017. 〈hal-01612954〉

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