English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The HH 211 protostellar system is currently the youngest Class 0 system foundwith a rotating disk. We have mapped it at ~ 50 au (0.16") resolution, studyingits magnetic field morphology with dust polarization in continuum at 232 and358 GHz and its kinematics in C18O J=2-1 line. A flattened envelope extendingout to ~ 400 au from the disk is detected in the continuum and C18O, slightlymisaligned with the disk by 8 degree. It is spiraling inwards and expected totransform into a rotating disk at ~ 20 au, consistent with the disk radiusestimated before. It appears to have a constant specific angular momentum anditself can result from an inside-out collapse of an extended envelope detectedbefore in NH$_3$. In the flattened envelope, the polarization is mainly due tothe magnetically aligned dust grains, inferring a highly pinched poloidal fieldmorphology there. Thus, both the kinematics and field morphology support thatthe flattened envelope is a pseudodisk formed as the infalling gas is guided bythe field lines to the equatorial plane. Interestingly, a point symmetricpolarization distribution is also seen in the flattened envelope, implying thatthe pinched field lines also have a significant toroidal component generated bythe rotation. No significant loss of angular momentum and thus no clearmagnetic braking are detected in the flattened envelope around the diskprobably because of the large misalignment between the axis of the rotation andthe axis of the magnetic field in the cloud core.

A Pseudodisk Threaded with a Toroidal and Pinched Poloidal Magnetic Field Morphology in the HH 211 Protostellar System