Centimeter continuum observations of the northern head of the HH 80/81/80N jet: revising the actual dimensions of a parsec scale jet

Abstract

We present 6 and 20 cm JVLA/VLA observations of the northern head of the HH 80/81/80N jet, one of the largest collimated jet systems known so far, aimed to look for knots further away than HH 80N, the northern head of the jet. Aligned with the jet and 10 arcmin northeast of HH 80N, we found a radio source not reported before, with a negative spectral index similar to that HH 80, HH 81 and HH 80N. The fit of a precessing jet model to the knots of the HH 80/81/80N jet, including the new source, shows that the position of this source is close to the jet path resulting from the modeling. If the new source belongs to the HH 80/81/80N jet, its derived size and dynamical age are 18.4 pc and >9000 yr, respectively. If the jet is symmetric, its southern lobe would expand beyond the cloud edge resulting in an asymmetric appearance of the jet. Based on the updated dynamical age, we speculate on the possibility that the HH 80/81/80N jet triggered the star formation observed in a dense core found ahead of HH 80N, which shows signposts of interaction with the jet. These results indicate that pc scale radio jets can play a role on the stability of dense clumps and the regulation of star formation in the molecular cloud.

11 pages, 2 figures, 2 tables, accepted for publication in ApJL

References in corpus (2)

• A Magnetized Jet from a Massive Protostar
• Resolving the Circumstellar Disk Around the Massive Protostar Driving the HH 80-81 Jet

Cited by in corpus (16)

• Radio Jets from Young Stellar Objects
• Multiple monopolar outflows driven by massive protostars in IRAS 18162-2048
• Detection of non-thermal emission from the massive protostellar jet HH80-81 at low radio frequencies using GMRT
• The circumestellar disk of the B0 protostar powering the HH 80-81 radio jet
• Unveiling a cluster of protostellar disks around the massive protostar GGD27 MM1
• Particle acceleration and magnetic field amplification in massive young stellar object jets
• CO multi-line observations of HH 80-81: a two-component molecular outflow associated with the largest protostellar jet in our Galaxy
• The double signature of local cosmic-ray acceleration in star-forming regions
• Evidence of non-thermal X-ray emission from HH 80
• IRAS 19520+2759: a 10^5 Lsun massive young stellar object driving a collimated outflow
• X-ray emission from stellar jets by collision against high-density molecular clouds: an application to HH 248
• Imaging of HH80-81 jet in the NIR shock tracers H${}_2$ and [Fe II]
• Modeling of thermal and non-thermal radio emission from HH80-81 jet
• Erosion of a dense molecular core by a strong outflow from a massive protostar
• GMRT observations of the protostellar jet associated with \iras
• Diverse stages of star formation in the IRAS 18162-2048 region. Emergence of UV Feedback