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Unveiling a magnetized jet from a low-mass protostar

Author

Listed:
  • Chin-Fei Lee

    (Academia Sinica Institute of Astronomy and Astrophysics
    National Taiwan University)

  • Hsiang-Chih Hwang

    (National Taiwan University
    Johns Hopkins 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
    East Asian Observatory, 660N. A’ohoku Place, University Park)

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.

Suggested Citation

  • Chin-Fei Lee & Hsiang-Chih Hwang & Tao-Chung Ching & Naomi Hirano & Shih-Ping Lai & Ramprasad Rao & Paul. T. P Ho, 2018. "Unveiling a magnetized jet from a low-mass protostar," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07143-8
    DOI: 10.1038/s41467-018-07143-8
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