| Abstract : | The Zeeman effect allows us to study the line-of-sight magnetic field in the interstellar medium. The most common tracers are HI, OH, and CN. However, at densities where the transition from sub-critical to super-critical occurs, the available tracers do not provide sufficient information to study the magnetic field. In this study, we employ the HI Narrow Self Absorption (HINSA) feature using the Five-hundred-meter Aperture Spherical Telescope (FAST) to study the line-of-sight magnetic field strengths towards a Planck Galactic Cold Clump (PGCC) G089.75-02.16. PGCCs are dense, cold clouds that host the pristine physical conditions governing the star formation process. We also analyze the mass-to-flux criticality and the Alfven Mach number to reveal the stability of the cloud and the role of turbulence in the cloud.
|
