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 Class 0 protostar IRAS 16293$-$2422 Source A is known to be a binarysystem (A1 and A2) or even a multiple system, which processes a complex outflowstructure. We have observed this source in the C$^{34}$S, SO, and OCS lines at3.1 mm with the Atacama Large Millimeter/submillimeter Array (ALMA). Asubstructure of this source is traced by our high angular-resolutionobservation (0\farcs12; 20 au) of the continuum emission. Thenorthwest-southeast (NW-SE) outflow on a 2\arcsec\ scale is detected in the SO($J_N$ = $2_2$--$1_1$) line. Based on the morphology of the SO distribution,this bipolar outflow structure seems to originate from the protostar A1 and itscircumstellar disk, or the circummultiple structure of Source A. The rotationmotion of the NW-SE outflow is detected in the SO and OCS emissions. Weevaluate the specific angular momentum of the outflowing gas to be $(8.6 -14.3) \times 10^{-4}$ km s$^{-1}$ pc. If the driving source of this outflow isthe protostar A1 and its circumstellar disk, it can be a potential mechanism toextract the specific angular momentum of the disk structure. These results canbe a hint for the outflow launching mechanism in this source. Furthermore, theyprovide us with an important clue to resolve the complicated structure of IRAS16293$-$2422 Source A.

Rotating Motion of the Outflow of IRAS 16293-2422 A1 at its Origin Point near the Protostar