Magneto-Centrifugal Origin for Protostellar Jets Validated through Detection of Radial Flow at the Jet Base

Abstract

Jets can facilitate the mass accretion onto the protostars in star formation. They are believed to be launched from accretion disks around the protostars by magneto-centrifugal force, as supported by the detections of rotation and magnetic field in some of them. Here we report a radial flow of the textbook-case protostellar jet HH 212 at the base to further support this jet-launching scenario. This radial flow validates a central prediction of the magneto-centrifugal theory of jet formation and collimation, namely, the jet is the densest part of a wide-angle wind that flows radially outward at distances far from the (small, sub-au) launching region. Additional evidence for the radially flowing wide-angle component comes from its ability to reproduce the structure and kinematics of the shells detected around the HH 212 jet. This component, which can transport material from inner to outer disk, could account for the chondrules and Ca-Al-rich inclusions detected in the Solar System at large distances.

arXiv comment18 pages, 6 figures

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Cited by in corpus (11)

• Formation and evolution of a protoplanetary disk: combining observations, simulations and cosmochemical constraints
• A Unified Model for Bipolar Outflows from Young Stars: Kinematic Signatures of Jets, Winds, and Their Magnetic Interplay with the Ambient Toroids
• JWST study of the DG Tau B disk wind candidate: I -- Overview and Nested H${}_2$/CO outflows
• A resolved rotating disk wind from a young T Tauri star in the Bok globule CB26
• A Unified Model for Bipolar Outflows from Young Stars: Apparent Magnetic Jet Acceleration
• First Detection of A Linear Structure in the Midplane of the Young HH 211 Protostellar Disk: A Spiral Arm?
• FAUST XV. A disk wind mapped by CH${}_3$OH and SiO in the inner 300 au of the NGC 1333 IRAS 4A2 protostar
• Early Planet Formation in Embedded Disks (eDisk). XI. A high-resolution view toward the BHR 71 Class 0 protostellar wide binary
• ALMA and VLBA views on the outflow associated with an O-type protostar in G26.50+0.28
• Bowshocks driven by the pole-on molecular jet of outbursting protostar SVS 13
• Research on the Interstellar Medium and Star Formation in the Galaxy: An Indian Perspective