| Name: | Omkar Jadhav |
| Affiliation: | Physical Research Laboratory |
| Conference ID : | ASI2024_330 |
| Title : | "Galactic `Snake' IRDC G11.11$-$0.12'': New Findings from SOFIA and JWST |
| Authors : | Omkar Jadhav 1 2, Lokesh Kumar Dewangan 1, Naval Kishor Bhadari 1 , Arup Kumar Maity 1 2 |
| Authors Affiliation: | 1. Physical Research Laboratory,Navrangpura, Ahmedabad 380009, India
2. Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar 382355, India
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| Mode of Presentation: | Poster |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | Numerous observational investigations have demonstrated that Infrared Dark Clouds (IRDCs) are important sites for studying the birth of massive stars and embedded protostars. IRDCs appear as absorption features against the galactic background in mid-infrared images. Magnetic fields are thought to play a crucial role in the mass accretion and stability of IRDCs. However, the exact role of magnetic fields in the early stages of star formation including massive stars remains unclear. The present work focuses on one of the well-studied IRDCs, which is Galactic ‘Snake’ IRDC G11.11-0.12 (hereafter, cloud G11). We have examined the existing SOFIA HAWC+ 214 μm polarimetric data toward G11, allowing us to study the plane of sky (POS) magnetic field (B-field) morphology. Overall, the POS magnetic field orientations are found to be perpendicular to the cloud G11. Moreover, a noticeable change in the position angle is found towards the center compared to the rest of the cloud. A ring-like structure is also investigated in the B-field orientations, and is located between the central and southern region of the cloud G11. We generated a POS B-field map using the Davis-Chandrasekhar-Fermi Method and computed mass-to-flux ratios, revealing both subcritical and supercritical regions in the cloud. However, embedded protostars are found toward the entire cloud. Interestingly, dust condensations hosting previously known high mass protostellar candidates p1 and p6 seem to be subcritical and supercritical, respectively. On the basis of the energy balance calculations, p6 is found to be in a more evolved state than p1. The existing JWST near-infrared images reveal a hub-filament configuration (below 10000 AU) around p1 and p6, where new embedded sources are investigated, which are not detected in the existing highly sensitive IR surveys. In this talk, I will offer a more detailed look at the results of this study. |
