The outflow history of two Herbig-Haro jets in RCW 36: HH 1042 and HH 1043
L. E. Ellerbroek, L. Podio, L. Kaper, H.Sana, D., Huppenkothen, A. de Koter, L. Monaco

TL;DR
This study analyzes the outflow history of two Herbig-Haro jets in RCW 36, revealing variable outflow rates, jet launching asymmetries, and physical conditions, thereby providing insights into star formation processes across different stellar masses.
Contribution
It presents the first detailed spectral analysis of HH 1042 and HH 1043 jets in RCW 36, demonstrating variable outflow rates and jet launching asymmetries in intermediate-mass YSOs.
Findings
Measured mass outflow rates ~ 10^-7 Msun/yr
High accretion rate ~ 10^-6 Msun/yr for HH 1042
Outflow velocity varies on ~100-year timescales
Abstract
Jets around low- and intermediate-mass young stellar objects (YSOs) contain a fossil record of the recent accretion and outflow activity of their parent star-forming systems. We aim to understand whether the accretion/ejection process is similar across the entire stellar mass range of the parent YSOs. To this end we have obtained VLT/X-shooter spectra of HH 1042 and HH 1043, two newly discovered jets in the massive star-forming region RCW 36. HH 1042 is associated with the intermediate-mass YSO 08576nr292. Over 90 emission lines are detected in the spectra. High-velocity (up to 220 km/s) blue- and redshifted emission from a bipolar flow is observed in typical shock tracers. Low-velocity emission from the background cloud is detected in nebular tracers, including lines from high ionization species. We applied combined optical and infrared spectral diagnostic tools in order to derive the…
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