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 infrared young stellar outflow source MHO 3252 Y3 in the Serpens Southstar-forming region was found to be variable. The available photometric datacan be fitted with a double peaked light curve of 904 d period. Colorvariations are consistent with variable extinction with a flatter wavelengthdependence than interstellar extinction, i.e., larger grains. MHO 3252 Y3 isthe source of a large scale bipolar outflow, but the most recent outflowactivity has produced a microjet detectable in the shock excited H_2 1--0 S(1)line while [FeII] emission appears confined to the immediate vicinity of thecentral star. The proper motion of individual shock fronts in the H_2 microjethas been measured and traces these knots back to ejection events in the pasttwo centuries. Integral field spectroscopy with the Keck 1 adaptive opticssystem and the OSIRIS instrument shows velocity components near the launchregion that are distinct from the microjet both in radial velocity and apparentproper motion. They match the prediction of dual wind models with a distinctlow velocity disk wind component. We find evidence for the entrainment of thislow velocity component into the high velocity microjet, leading to shockexcited emission at intermediate velocities in an envelope around the microjet.

Variability and Jet Activity in the YSO MHO~3252~Y3 in Serpens South