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

Full paper

View the references in ADS

Number of rows : 4

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	V* DG Tau	Or*	04 27 04.6921275888	+26 06 16.060169268	13.57	13.97	10.50	12.28	K6Ve	1010	1
2	QSO B0507+179	QSO	05 10 02.36912937	+18 00 41.5815635		20.0	19.0	19.09	~	396	1
3	HH 212	HH	05 43 51.41	-01 02 53.1					~	369	1
4	ICRF J055250.1+031327	Bz?	05 52 50.10145853	+03 13 27.2442176				22.79	~	55	1

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