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

From measuring the annual parallax of water masers over one and a half yearswith VERA, we present the trigonometric parallax and corresponding distance ofanother newly identified water maser source in the region of IRAS 20231+3440 as$\pi=0.611\pm0.022$ mas and $D=1.64\pm0.06$ kpc respectively. We measured theabsolute proper motions of all the newly detected maser spots (30 spots) andpresented two pictures describing the possible spatial distribution of thewater maser as the morphology marks out an arc of masers whose average propermotion velocity in the jet direction was 14.26 km s$^{-1}$. As revealed by theALLWISE composite image, and by applying the colour-colour method of YSOidentification and classification on photometric archived data, we identifiedthe driving source of the north maser group to be a class I, young stellarobject. To further probe the nature of the progenitor, we used the momentumrate maximum value (1.2$\times$10$^{-4}$ M$_{\odot}$ yr$^{-1}$ km s$^{-1}$) ofthe outflow to satisfy that the progenitor under investigation is a low massyoung stellar object concurrently forming alongside an intermediate-mass YSO$\sim 60,000$ au ($\sim 37$ arcsecs) away from it.

Bowshocks in a newly discovered maser source in IRAS 20231+3440