| Name: | Sreelekshmi Mohan |
| Affiliation: | Indian Institute of Space Science and Technology |
| Conference ID : | ASI2023_121 |
| Title : | Imaging of HH80-81 jet in the near infrared emission lines |
| Authors : | Sreelekshmi Mohan, Dr. Sarita Vig, Dr. Watson. P Varricatt, Dr. Anandmayee Tej |
| Mode of Presentation: | Oral |
| Abstract Category : | Stars, ISM and Galaxy |
| Abstract : | Star formation proceeds by the accretion of mass from dense envelopes around them and eventually launching bipolar jets along the rotation axis. These jets on interaction with the interstellar medium generate shocks which are rich in atomic and molecular emission lines. We utilize these lines to characterize the shock nature and to compute the physical parameters associated with the jet. The target of our study is the massive protostellar jet HH80-81 which is the largest and most collimated jet known so far in our Galaxy. Near-infrared line imaging observations of the jet in the H2 (2.122 μm) and [Fe II] (1.644 μm) lines were carried out using the United Kingdom Infrared Telescope (UKIRT). We have detected for the first time H2 and [Fe II] line emissions from nine groups of knots associated with the jet. For each knot, we have morphologically characterized the shock nature. Using the [FeII]/H2 line flux ratios we identify the dominance of dissociative J-type shocks throughout the jet. The mass-loss and accretion rates estimated are 1-2 orders of magnitude higher than that of low-mass protostellar jets, thereby reinforcing the fact that massive star formation is plausibly a scaled up version of low-mass star formation. |
