Unveiling a magnetized jet from a low-mass protostar

Chin-Fei Lee (), Hsiang-Chih Hwang, Tao-Chung Ching, Naomi Hirano, Shih-Ping Lai, Ramprasad Rao and Paul. T. P Ho
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Chin-Fei Lee: Academia Sinica Institute of Astronomy and Astrophysics
Hsiang-Chih Hwang: National Taiwan University
Tao-Chung Ching: National Tsing Hua University
Naomi Hirano: Academia Sinica Institute of Astronomy and Astrophysics
Shih-Ping Lai: National Tsing Hua University
Ramprasad Rao: Academia Sinica Institute of Astronomy and Astrophysics
Paul. T. P Ho: Academia Sinica Institute of Astronomy and Astrophysics

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Protostellar jets are one of the most intriguing signposts in star formation. Recent detection of a jet rotation indicates that they can carry away angular momenta from the innermost edges of the disks, allowing the disks to feed the central protostars. In current jet-launching models, magnetic fields are required to launch and collimate the jets, however, observationally, it is still uncertain if magnetic fields are really present in the jets. Here we report a clear detection of SiO line polarization in the HH 211 protostellar jet. Since this line polarization has been attributed to the Goldreich-Kylafis effect in the presence of magnetic field, our observations show convincingly the presence of magnetic field in a jet from a low-mass protostar. The implied magnetic field could be mainly toroidal, as suggested in current jet-launching models, in order to collimate the jet at large distances.

Date: 2018
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DOI: 10.1038/s41467-018-07143-8

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