Details

Autor(en) / Beteiligte

• Lee, Chin-Fei
• Hwang, Hsiang-Chih
• Ching, Tao-Chung
• Hirano, Naomi
• Lai, Shih-Ping
• Rao, Ramprasad
• Ho, Paul. T. P

Titel

Unveiling a magnetized jet from a low-mass protostar

Ist Teil von

• Nature communications, 2018-11, Vol.9 (1), p.4636-7, Article 4636

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. The presence of magnetic fields in protostellar jets has been predicted theoretically, but its experimental confirmation has been elusive so far. Here, the authors report the detection of SiO line polarisation in the HH 211 protostellar jet, indicative of the onset of magnetic fields.