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

The triple radio source detected in association with the luminous infraredsource IRAS 16547-4247 has previously been studied with high angular resolutionand high sensitivity with the Very Large Array (VLA) at 3.6-cm wavelength. Inthis paper, we present new 3.6 cm observations taken 2.68 years after the firstepoch that allow a search for variability and proper motions, as well as thedetection of additional faint sources in the region. We do not detect propermotions along the axis of the outflow in the outer lobes of this source at a4-$\sigma$ upper limit of $\sim$160 km s$^{-1}$. This suggests that these lobesare probably working surfaces where the jet is interacting with a densermedium. However, the brightest components of the lobes show evidence ofprecession, at a rate of $0\rlap.^\circ08$ yr$^{-1}$ clockwise in the plane ofthe sky. It may be possible to understand the distribution of almost all theidentified sources as the result of ejecta from a precessing jet. The core ofthe thermal jet shows significant variations in flux density and morphology. Wecompare this source with other jets in low and high mass young stars andsuggest that the former can be understood as a scaled-up version of the latter.

The Collimated Jet Source in IRAS 16547-4247: Time Variation, Possible Precession, and Upper Limits to the Proper Motions Along the Jet Axis