2017A&A...607L...6T

Query : 2017A&A...607L...6T

2017A&A...607L...6T - Astronomy and Astrophysics, volume 607, L6-6 (2017/11-1)

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

TABONE B., CABRIT S., BIANCHI E., FERREIRA J., PINEAU DES FORETS G., CODELLA C., GUSDORF A., GUETH F., PODIO L. and CHAPILLON E.

Abstract (from CDS):

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∼60au 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%.

Abstract Copyright: © ESO, 2017

Journal keyword(s): stars: formation - ISM: jets and outflows - ISM: individual objects: HH212 - ISM: individual objects: HH212

CDS comments: Calibrators J0541-0211 and J0552-3627 not identified.

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* DG Tau Or* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1023 1
2 QSO B0507+179 QSO 05 10 02.36912937 +18 00 41.5815635   20.0 19.0 19.09   ~ 433 1
3 HH 212 HH 05 43 51.41 -01 02 53.1           ~ 391 1
4 ICRF J055250.1+031327 Bz? 05 52 50.10145853 +03 13 27.2442176       22.79   ~ 58 1

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