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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present high angular resolution Very Large Array multi-epoch continuumobservations at 3.6 cm and 7 mm towards the core of the L723 multipolar outflowrevealing a multiple system of four radio sources suspected to be YSOs in aregion of only ~4 arcsecs (1200 AU) in extent. The 3.6 cm observations showthat the previously detected source VLA 2 contains a close (separation ~0.29arcsecs or ~90 AU) radio binary, with components (A and B) along a positionangle of ~150 degrees. The northern component (VLA 2A) of this binary system isalso detected in the 7 mm observations, with a positive spectral index between3.6 cm and 7 mm. In addition, the source VLA 2A is associated with extendedemission along a position angle of ~115 degrees, that we interpret asoutflowing shock-ionized gas that is exciting a system of HH objects with thesame position angle. A third, weak 3.6 cm source, VLA 2C, that is detected alsoat 7 mm, is located ~0.7 arcsecs northeast of VLA 2A, and is possiblyassociated with the water maser emission in the region. The 7 mm observationsreveal the presence of an additional source, VLA 2D, located ~3.5 arcsecssoutheast of VLA 2A, and with a 1.35 mm counterpart. All these radio continuumsources have a positive spectral index, compatible with them being YSOs. Wealso propose that the high velocity CO emission observed in the region could bethe superposition of multiple outflows (at least three independent bipolaroutflows) excited by the YSOs located at the core, instead of the previousinterpretations in terms of only one or two outflows.

A Multiple System of Radio Sources at the Core of the L723 Multipolar Outflow