Deciphering the Hidden Structures of HH 216 and Pillar IV in M16: Results from JWST and HST

• DOI: 10.48550/arxiv.2401.06016
• Publication Date: 2024-01-01
• Authors: L. K. Dewangan; O. R. Jadhav; A. K. Maity; N. K. Bhadari; Saurabh Sharma; M. Padovani; Tapas Baug; Y. D. Mayya; Rakesh Pandey
• Keywords: Protostar; Outflow

To probe the star formation process, we present an observational investigation of Pillar IV and ionized knot HH 216 in Eagle Nebula (M16). is known to host a Class I protostar that drives bipolar outflow. The outflow has produced bow shock, 216, which associated with red-shifted lobe. James Webb Space Telescope's near- mid-infrared images (resolution $\sim$0.07 arcsec - 0.7 arcsec) reveal as single, isolated object (below 1000 AU). outer boundary depicted 3.3 $\mu$m Polycyclic aromatic hydrocarbon (PAH) emission. traced 4.05 Br$\alpha$ radio continuum emission, however it undetected 4.693 H$_{2}$ seems be both thermal non-thermal emissions. High-resolution entangled structures 3000 AU) appear located toward termination shocks. New knots emission are detected, mainly found on IV's northern side. This particular result supports previously proposed episodic accretion powering source 216. One part jet (extent $\sim$0.16 pc) discovered southern side driving source. Using $^{12}$CO($J$ = 1-0), 3-2), $^{13}$CO($J$ 1-0) signposts Cloud-Cloud Collision (or interacting clouds) investigated. Overall, our results suggest interaction molecular cloud components around 23 26 km s$^{-1}$ might have influenced activity IV.