| Name: Bhaskarjyoti Barman |
| Affiliation: Assam University (A Central University), Silchar-788011 |
| Conference ID: ASI2026_404 |
| Title: Magnetic Field Geometry and Stability in Two Molecular Clouds toward the Galactic Center and Anticenter |
| Abstract Type: Poster |
| Abstract Category: Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Author(s) and Co-Author(s) with Affiliation: Bhaskarjyoti Barman(Department of Physics, Assam University, Silchar 788011, India), Himadri Sekhar Das(Department of Physics, Assam University, Silchar 788011, India) |
| Abstract: Molecular clouds provide excellent laboratories for studying the interplay between magnetic fields, turbulence, and gravity in star-forming environments. We present a comparative analysis of two such clouds: L1604, located toward the Galactic anticenter, and L121, situated toward the Galactic center. Using optical R-band polarimetry, supported by near-infrared photometry, Gaia distances, and Herschel SPIRE data, we examine their magnetic field geometries, extinction structures, and physical conditions. L1604 shows an alignment of its envelope magnetic field with the Galactic magnetic field, whereas L121 exhibits a large offset, likely due to local magnetic perturbations. Magnetic field strengths, derived using the Davis–Chandrasekhar–Fermi method, indicate sub-Alfvénic and sub-critical regimes, pointing to magnetic dominance over turbulence and gravity in the envelopes of both clouds. These results suggest that while magnetic fields provide significant support at the envelope scale, the cores may evolve differently, potentially becoming supercritical—a possibility that requires further investigation. |
