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 G31.41+0.31 (G31) hot molecular core (HMC) is a high-mass protoclustershowing accelerated infall and rotational spin-up that is well studied athigh-angular resolution. To complement the accurate view of the small scale inG31, we have traced the kinematics of the large-scale material by carrying outN$_2$H$^+$\,(1--0) observations with the IRAM 30m telescope of an area of$\sim$6$\times6$\,arcmin$^2$ around the HMC. The N$_2$H$^+$ observations haverevealed a large-scale (5\,pc) hub-filament system (HFS) composed by at leastfour filamentary arms and a NNE--SSW velocity gradient ($\sim$0.4\,km/s/pc)between the northern and southern filaments. The linewidth increases towardsthe hub at the center of the HFS reaching values of 2.5--3\,km\,s$^{-1}$ in thecentral 1\,pc. The origin of the large-scale velocity gradient is likelycloud-cloud collision. In this scenario, the filaments in G31 would have formedby compression resulting from the collision and the rotation of the HMCobserved at scales of 1000\,au would have been induced by shear caused by thecloud-cloud collision at scales of a few pc. We conclude that G31 represents aHFS in a compressed layer with an orthogonal orientation to the plane of thesky, and represents a benchmark for the filaments-to-clusters paradigm of starformation.

Cloud-cloud collision as origin of the G31.41+0.31 massive protocluster