Abstract Details
| Name: Omkar Jadhav Affiliation: Physical Research Laboratory Conference ID: ASI2025_401 Title : Understanding the Interplay of Magnetic Fields and Gas Dynamics in the G47 filamentary cloud Authors and Co-Authors : Omkar Jadhav 1,2, Lokesh Kumar Dewangan 1, Naval Kishor Bhadari 1, Arup Kumar Maity 1,2, Sanhueza Patricio 3,4, Saurabh Sharma 5, Ram Kesh Yadav 6, Abd Al Karim Haj Ismail 7 Abstract Type : Poster Abstract Category : Stars, Interstellar Medium, and Astrochemistry in Milky Way Abstract : Several studies have shown that filamentary clouds are associated with the star formation activities. However, the overall process of star formation remains highly complex due to the interplay among gravity, turbulence, magnetic field (B-field), and stellar feedback. Among these the role of B-field in the process of star-formation remain the least understood. To understand the role of B-field in star formation processes, we present a multi-wavelength study of the filamentary cloud G47 (hereafter G47; d ∼4.44 kpc) containing mid-infrared bubbles, N98, B1, and B2. The SMGPS 1.3 GHz continuum map detected radio emission toward N98, B1, and newly depicted emission from B2. SOFIA/HAWC+ 214 μm polarization data show that the plane-of-the-sky B-field toward G47 is mostly perpendicular to the cloud’s major axis, though some regions exhibit a curved structure. The position-position-velocity (PPV) diagram of 13CO reveals a U-shaped structure toward the N98 HII region, with a blue-shifted component near 52.3 km/s and a red-shifted component around 63 km/s. The red-shifted component is spatially associated with the curved B-field morphology. This U-shaped structure in PPV space suggests that N98 may be a new candidate for a bipolar HII region with a nearly face-on geometry. The energy budget calculations suggests that the B-field dominates over turbulence and gravity in the G47. Furthermore, the radial column density and velocity profiles of G47 show the signatures of converging flows in a sheet-like structure in the G47. The analysis of the relative orientations between the B-field and local gravity suggests that G47 may undergo gravitational contraction along the B-field lines once it becomes magnetically supercritical. Overall, these findings suggest that B-fields have a significant influence on the star formation processes in G47. During this presentation, I will discuss these results in more detail. |