The JCMT BISTRO-3 Survey: Variation of magnetic field orientations on parsec and sub-parsec scales in the massive star-forming region G28.34+0.06

Abstract

Magnetic fields play a significant role in star-forming processes on core to clump scales. We investigate magnetic field orientations and strengths in the massive star-forming clump P2 within the filamentary infrared dark cloud G28.34+0.06 using dust polarization observations made using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope as part of the B-field In STar-forming Region Observations (BISTRO) survey. We compare the magnetic field orientations at the clump scale of ~2 parsecs from these JCMT observations with those at the core scale of ~0.2 parsecs from archival ALMA data, finding that the magnetic field orientations on these two different scales are perpendicular to one another. We estimate the distribution of magnetic field strengths, which range from 50 to 430 μG over the clump. The region forming the core shows the highest magnetic field strength. We also obtain the distribution of mass-to-flux ratios across the clump. In the region surrounding the core, the mass-to-flux ratio is larger than 1, which indicates the magnetic field strength is insufficient to support the region against gravitational collapse. Therefore, the change in the magnetic field orientation from clump to core scales may be the result of gravitational collapse, with the field being pulled inward along with the flow of material under gravity.

References in corpus (32)

• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models
• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• SCUBA-2: The 10000 pixel bolometer camera on the James Clerk Maxwell Telescope
• Structural Analysis of Molecular Clouds: Dendrograms
• The Critical Density and the Effective Excitation Density of Commonly Observed Molecular Dense Gas Tracers
• Radiative torques: Analytical Model and Basic Properties
• Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
• Planck intermediate results. XXXV. Probing the role of the magnetic field in the formation of structure in molecular clouds
• Molecular ions in L1544. II. The ionization degree
• SCUBA-2: iterative map-making with the Sub-Millimetre User Reduction Facility
• SCUBA-2: on-sky calibration using submillimetre standard sources
• Magnetic Fields and Massive Star Formation
• Multi-temperature mapping of dust structures throughout the Galactic Plane using the PPMAP tool with Herschel Hi-GAL data
• The JCMT BISTRO Survey: The magnetic field strength in the Orion A filament
• First results from BISTRO -- a SCUBA-2 polarimeter survey of the Gould Belt
• ALMA observations of dust polarization and molecular line emission from the Class 0 protostellar source Serpens SMM1
• NH3 Observations of the Infrared Dark Cloud G28.34+0.06
• A holistic perspective on the dynamics of G035.39-00.33: the interplay between gas and magnetic fields
• Magnetic Field Strength Maps for Molecular Clouds: A New Method Based on a Polarization - Intensity Gradient Relation
• Gravity, Magnetic Field, and Turbulence: Relative Importance and Impact on Fragmentation in the Infrared Dark Cloud G34.43+00.24
• A Decade of SCUBA-2: A Comprehensive Guide to Calibrating 450 $\mu$m and 850 $\mu$m Continuum Data at the JCMT
• Calibrating the Davis-Chandrasekhar-Fermi method with numerical simulations: uncertainties in estimating the magnetic field strength from statistics of field orientations
• Polarization Properties and Magnetic Field Structures in the High-Mass Star-Forming Region W51 Observed with ALMA
• Cloud structure of three Galactic infrared dark star-forming regions from combining ground and space based bolometric observations
• The JCMT BISTRO Survey: The Distribution of Magnetic Field Strengths towards the OMC-1 Region
• Magnetic field properties in star formation: a review of their analysis methods and interpretation
• Magnetic fields in the early stages of massive star formation as revealed by ALMA
• The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2
• A Multi-Scale Picture of Magnetic Field and Gravity from Large-Scale Filamentary Envelope to Core-Accreting Dust Lanes in the High-Mass Star-Forming Region W51
• Fitting an Analytic Magnetic Field to a Prestellar Core
• The spatial correlation between CN line and dust continuum emitting regions in high-mass star-forming cloud