Revealing the diverse magnetic field morphologies in Taurus dense cores with sensitive sub-millimeter polarimetry

Abstract

We have obtained sensitive dust continuum polarization observations at 850 $\mu$m in the B213 region of Taurus using POL-2 on SCUBA-2 at the James Clerk Maxwell Telescope (JCMT), as part of the BISTRO (B-fields in STar-forming Region Observations) survey. These observations allow us to probe magnetic field (B-field) at high spatial resolution ($\sim$2000 au or $\sim$0.01 pc at 140 pc) in two protostellar cores (K04166 and K04169) and one prestellar core (Miz-8b) that lie within the B213 filament. Using the Davis-Chandrasekhar-Fermi method, we estimate the B-field strengths in K04166, K04169, and Miz-8b to be 38$\pm$14 $\mu$G, 44$\pm$16 $\mu$G, and 12$\pm$5 $\mu$G, respectively. These cores show distinct mean B-field orientations. B-field in K04166 is well ordered and aligned parallel to the orientations of the core minor axis, outflows, core rotation axis, and large-scale uniform B-field, in accordance with magnetically regulated star formation via ambipolar diffusion taking place in K04166. B-field in K04169 is found to be ordered but oriented nearly perpendicular to the core minor axis and large-scale B-field, and not well-correlated with other axes. In contrast, Miz-8b exhibits disordered B-field which show no preferred alignment with the core minor axis or large-scale field. We found that only one core, K04166, retains a memory of the large-scale uniform B-field. The other two cores, K04169 and Miz-8b, are decoupled from the large-scale field. Such a complex B-field configuration could be caused by gas inflow onto the filament, even in the presence of a substantial magnetic flux.

arXiv comment20 pages (10 are main), 5 figures (3 are main), and 3 tables (2 are main); Accepted for its publication in ApJL

References in corpus (73)

• Theory of Star Formation
• Control of star formation by supersonic turbulence
• Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models
• Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?
• SCUBA-2: The 10000 pixel bolometer camera on the James Clerk Maxwell Telescope
• Rapid Formation of Molecular Clouds and Stars in the Solar Neighborhood
• Dissipation in Compressible MHD Turbulence
• 9286 Stars: An Agglomeration of Stellar Polarization Catalogs
• Planck intermediate results. XXXV. Probing the role of the magnetic field in the formation of structure in molecular clouds
• Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
• Magnetic Fields in the Formation of Sun-Like Stars
• SCUBA-2: iterative map-making with the Sub-Millimetre User Reduction Facility
• Turbulent Flow-Driven Molecular Cloud Formation: A Solution to the Post-T Tauri Problem?
• Collapse of Magnetized Singular Isothermal Toroids: II. Rotation and Magnetic Braking
• Dispersion of Magnetic Fields in Molecular Clouds. I
• SCUBA-2: on-sky calibration using submillimetre standard sources
• SCUBA Polarization Measurements of the Magnetic Field Strengths in the L183, L1544, and L43 Prestellar Cores
• TADPOL: A 1.3 mm Survey of Dust Polarization in Star-forming Cores and Regions
• Molecular gas kinematics within the central 250 pc of the Milky Way
• Clouds as Turbulent Density Fluctuations. Implications for pressure confinement and spectral line data interpretation
• Flows, Fragmentation, and Star Formation. I. Low-mass Stars in Taurus
• Misalignment of Magnetic Fields and Outflows in Protostellar Cores
• Chains of dense cores in the Taurus L1495/B213 complex
• The Magnetic Field in Taurus Probed by Infrared Polarization
• Radiation-magnetohydrodynamic simulations of HII regions and their associated PDRs in turbulent molecular clouds
• Reconstructing the density and temperature structure of prestellar cores from $Herschel$ data: A case study for B68 and L1689B
• A molecular survey of outflow gas: velocity-dependent shock chemistry and the peculiar composition of the EHV gas
• The JCMT BISTRO Survey: The magnetic field strength in the Orion A filament
• Observational Constraints on the Ages of Molecular Clouds and the Star-Formation Timescale: Ambipolar-Diffusion--Controlled or Turbulence-Induced Star Formation?
• A census of dense cores in the Taurus L1495 cloud from the Herschel Gould Belt Survey
• First results from BISTRO -- a SCUBA-2 polarimeter survey of the Gould Belt
• The Magnetic Field Morphology of the Class 0 Protostar L1157-mm
• What are we learning from the relative orientation between density structures and the magnetic field in molecular clouds?
• Interferometric observations of magnetic fields in forming stars
• Anchoring Magnetic Field in Turbulent Molecular Clouds
• Optical polarimetry toward the Pipe nebula: Revealing the importance of the magnetic field
• Planck intermediate results. XXXIII. Signature of the magnetic field geometry of interstellar filaments in dust polarization maps
• ALMA observations of dust polarization and molecular line emission from the Class 0 protostellar source Serpens SMM1
• Unveiling the Role of the Magnetic Field at the Smallest Scales of Star Formation
• Moving mesh simulations of star forming cores in magneto-gravo-turbulence
• Magnetized filamentary gas flows feeding the young embedded cluster in Serpens South
• Magnetic fields in massive star forming regions
• Probing accretion of ambient cloud material into the Taurus B211/B213 filament
• Magnetic fields towards Ophiuchus-B derived from SCUBA-2 polarization measurements
• Results of SPARO 2003: Mapping Magnetic Fields in Giant Molecular Clouds
• A First Look at BISTRO Observations of The $\rho$ Oph-A core
• Magnetic Field Structure around Low-Mass Class 0 Protostars: B335, L1527 and IC348-SMM2
• JCMT BISTRO survey: Magnetic Fields within the Hub-Filament Structure in IC 5146
• Probing changes of dust properties along a chain of solar-type prestellar and protostellar cores in Taurus with NIKA
• JCMT BISTRO Survey observations of the Ophiuchus Molecular Cloud: Dust grain alignment properties inferred using a Ricean noise model
• The JCMT BISTRO Survey: The Magnetic Field of the Barnard 1 Star-Forming Region
• The JCMT BISTRO Survey: Magnetic Fields Associated with a Network of Filaments in NGC 1333
• The JCMT BISTRO Survey: The Magnetic Field In The Starless Core $\rho$ Ophiuchus C
• On the Role of Pseudodisk Warping and Reconnection in Protostellar Disk Formation in Turbulent Magnetized Cores
• Magnetic field morphology in nearby molecular clouds as revealed by starlight and submillimetre polarization
• JCMT POL-2 and BISTRO Survey observations of magnetic fields in the L1689 molecular cloud
• First observations of the magnetic field inside the Pillars of Creation: Results from the BISTRO survey
• Magnetic fields in the massive dense cores of DR21 filament: weakly magnetized cores in a strongly magnetized filament
• FRagmentation and Evolution of dense cores Judged by ALMA (FREJA). I (Overview). Inner $\sim$1000 au structures of prestellar/protostellar cores in Taurus
• Near-Infrared Imaging Polarimetry of the Serpens Cloud Core: Magnetic Field Structure, Outflows, and Inflows in A Cluster Forming Clump
• Magnetic fields in the early stages of massive star formation as revealed by ALMA
• Kinematics of dense gas in the L1495 filament
• Non-ideal magnetohydrodynamics vs turbulence I: Which is the dominant process in protostellar disc formation?
• The JCMT BISTRO survey: alignment between outflows and magnetic fields in dense cores/clumps
• ALMA observations reveal no preferred outflow--filament and outflow--magnetic field orientations
• The JCMT Gould Belt Survey: A First Look at IC 5146
• Subsonic islands within a high-mass star-forming IRDC
• Molecular Jet of IRAS 04166+2706
• Possible Counter Rotation between the Disk and Protostellar Envelope around the Class I Protostar IRAS 04169+2702
• Unveiling the importance of magnetic fields in the evolution of dense clumps formed at the waist of bipolar H II regions: a case study on Sh2-201 with JCMT SCUBA-2/POL-2
• Interactions between Gas Dynamics and Magnetic Fields in the Massive Dense Cores of the DR21 Filament
• The JCMT Legacy Survey of the Gould Belt: a first look at Taurus with HARP
• Rotation of Two Micron All Sky Survey Clumps in Molecular Clouds

Cited by in corpus (18)

• Magnetic fields in star formation: a complete compilation of all the DCF estimations
• Mapping the magnetic field in the Taurus/B211 filamentary cloud with SOFIA HAWC+ and comparing with simulation
• B-fields in Star-Forming Region Observations (BISTRO): Magnetic Fields in the Filamentary Structures of Serpens Main
• The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2
• The JCMT BISTRO-2 Survey: Magnetic Fields of the Massive DR21 Filament
• SOFIA observations of 30 Doradus: II -- Magnetic fields and large scale gas kinematics
• Triple spiral arms of a triple protostar system imaged in molecular lines
• A panoptic view of the Taurus molecular cloud I. The cloud dynamics revealed by gas emission and 3D dust
• Evolution of the Hub-filament Structures in IC 5146 in the Context of the Energy Balance of Gravity, Turbulence, and Magnetic Field
• Three-dimensional magnetic fields of molecular clouds
• First BISTRO observations of the dark cloud Taurus L1495A-B10: the role of the magnetic field in the earliest stages of low-mass star formation
• Magnetic Fields and Fragmentation of Filaments in the Hub of California-X
• IC 5146 dark Streamer: is a first reliable candidate of edge collapse, hub-filament systems, and intertwined sub-filaments?
• The Role of Magnetic Fields in the Formation of the Filamentary Infrared Dark Cloud G11.11-0.12
• Star-forming environments in smoothed particle magnetohydrodynamics simulations I: Clump extraction and properties
• Dust destruction by the supernova remnant forward shock in a turbulent interstellar medium
• The role of magnetic fields in the fragmentation of the Taurus B213 filament into Sun-type star-forming cores
• Magnetic field alignment with dense cores in the transition between cloud and core scales