4.6 Article

MAGNETIC FIELD STRUCTURE IN THE FLATTENED ENVELOPE AND JET IN THE YOUNG PROTOSTELLAR SYSTEM HH 211

Journal

ASTROPHYSICAL JOURNAL LETTERS
Volume 797, Issue 1, Pages -

Publisher

IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/797/1/L9

Keywords

ISM: individual objects (HH 211); ISM: magnetic fields; polarization; stars: formation

Funding

  1. National Science Council of Taiwan [NSC 101-2119-M-001-002-MY3]
  2. Academia Sinica (Career Development Award)

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HH 211 is a young Class 0 protostellar system with a flattened envelope, a possible rotating disk, and a collimated jet. We have mapped it with the Submillimeter Array in the 341.6 GHz continuum and SiO J = 8-7 at similar to 0 ''.6 resolution. The continuum traces the thermal dust emission in the flattened envelope and the possible disk. Linear polarization is detected in the continuum in the flattened envelope. The field lines implied from the polarization have different orientations, but they are not incompatible with current gravitational collapse models, which predict a different orientation depending on the region/distance. Also, we might have detected for the first time polarized SiO line emission in the jet due to the Goldreich-Kylafis effect. Observations at higher sensitivity are needed to determine the field morphology in the jet.

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