Multiscale magnetic fields in the OB-cluster forming region G10.62-0.38

ABSTRACT :
In this talk, we present ALMA results of dust continuum polarimetry toward the OB-cluster forming region G10.62-0.38, as part of the Magnetic Fields in Massive Star-forming Regions (MagMaR) survey. We compare the ALMA data with follow-up JCMT POL-2 continuum polarization data to establish a comprehensive picture of multiscale magnetic fields, spanning from parsec-scale filaments to 0.1-pc streamers, and down to 1000 AU-scale rotating toroids. The magnetic fields exhibit an hourglass morphology on the parsec scale, likely influenced by the large-scale filaments, and gradually align with the rotating, infalling streamers on the 0.1-pc scale. Upon reaching the central rotating toroid, the magnetic fields appear to be further shaped by rotational motion, displaying a poloidal-like morphology. Our findings indicate that the role of magnetic fields continuously evolves with the changing physical structures across various scales.