| Name: Vinod Chandra Pathak |
| Affiliation: TIFR, Mumbai |
| Conference ID: ASI2026_660 |
| Title: Characterizing Jets, Winds, and Accretion Diagnostics in HV Tau C with JWST/MIRI |
| Abstract Type: Poster |
| Abstract Category: Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Author(s) and Co-Author(s) with Affiliation: Vinod Chandra Pathak(Tata Instititute of Fundamental Research, Mumbai - 400005, India), Manoj Puravankara(Tata Institute of Fundamental Research, Mumbai - 400005, India), HimanshuTyagi(Tata Institute of Fundamental Research, Mumbai - 400005, India), Shridharan Baskaran(Tata Institute of Fundamental Research, Mumbai - 400005, India), Bihan Banerjee and the MINDS collaboration(Tata Institute of Fundamental Research, Mumbai - 400005, India) |
| Abstract: The evolution of protoplanetary disks is driven by accretion and ejection processes, where collimated jets and slower wide-angle winds play a central role in angular momentum removal and mass dispersal. We present Mid-Infrared Disk Survey(MINDS) cycle 1 GTO JWST MIRI/MRS observations of the edge-on Class II source HV Tau C, expanding on our previous analysis of its extended molecular (H₂) wind. In this study, we shift focus to the prominent collimated jets and suprathermal OH emission detected in the same dataset.
Alongside the H₂ wind, the JWST spectrum reveals a rich set of jet tracers, including fine-structure lines of [Fe II], [Ne II], and [Ar II]. We characterize the morphology and kinematics of these jets and employ shock modeling to constrain their excitation conditions and dynamical properties. We also detect strong emission from suprathermal OH lines, which may arise from UV photodissociation of water in the disk surface or wind. We analyze these lines to investigate their origin and assess their potential as tracers of disk accretion when combined with H I recombination line diagnostics.
Our primary goal is to compare the mass-loss budgets of the wide-angle H₂ wind and the collimated jets to determine which component dominates mass ejection in this Class II system, and to test whether trends observed in younger protostars persist at later evolutionary stages. Finally, we outline a program to extend this unified analysis of winds, jets, and disk tracers to other edge-on disks in the JWST archive. This work highlights JWST’s unique ability to deliver a comprehensive view of disk–outflow interactions during planet formation. |
