Magnetic fields in massive star forming regions

Abstract

We present the largest sample of high-mass star-forming regions observed using submillimetre imaging polarimetry. The data were taken using SCUBA in conjunction with the polarimeter on the JCMT in Hawaii. In total, 16 star forming regions were observed, although some of these contain multiple cores. The polarimetry implies a variety of magnetic field morphologies, with some very ordered fields. We see a decrease in polarisation percentage for 7 of the cores. The magnetic field strengths estimated for 14 of the cores, using the corrected CF method, range from <0.1 mG to almost 6 mG. These magnetic fields are weaker on these large scales when compared to previous Zeeman measurements from maser emission, implying the role of the magnetic field in star formation increases in importance on smaller scales. Analysis of the alignment of the mean field direction and the outflow directions reveal no relation for the whole sample, although direct comparison of the polarimetry maps suggests good alignment (to at least one outflow direction per source) in 7 out of the 15 sources with outflows.

21 pages, 2 figures

References in corpus (27)

• SCUBA: A common-user submillimetre camera operating on the James Clerk Maxwell Telescope
• High-Mass Proto-Stellar Candidates - I : The Sample and Initial Results
• Structure and Evolution of the Envelopes of Deeply Embedded Massive Young Stars
• A CS J=5-4 Mapping Survey Towards High-mass Star Forming Cores Associated with Water Masers
• A disk of dust and molecular gas around a high-mass protostar
• Magnetic Field Diagnostics Based on Far-Infrared Polarimetry: Tests Using Numerical Simulations
• Interferometric Mapping of Magnetic Fields in Star-forming Regions III. Dust and CO polarization in DR21(OH)
• The Magnetic Field in the Star-forming Region Cepheus A from Water Maser Polarization Observations
• Dust emissivity in the Submm/Mm: SCUBA and SIMBA observations of Barnard 68
• Towards the automated reduction and calibration of SCUBA data from the James Clerk Maxwell Telescope
• A Submillimetre Imaging Polarimeter at the James Clerk Maxwell Telescope
• A SCUBA survey of L1689 - The dog that didn't bark
• On the alignment of classical T Tauri stars with the magnetic field in the Taurus-Auriga molecular cloud
• Probing the Magnetic Field with Molecular Ion Spectra
• A molecular-line study of clumps with embedded high-mass protostar candidates
• Magnetic field in Cepheus A as deduced from OH maser polarimetric observations
• Submillimeter Imaging Polarimetry of the NGC 7538 Region
• Very compact radio emission from high-mass protostars. I. CRL 2136: Continuum and water maser observations
• VLA OH and H I Zeeman Observations of the NGC 6334 Complex
• The Magnetic Field Structure in W51A
• VLA and BIMA observations toward the exciting source of the massive HH~80-81 outflow
• Molecular outflows around high-mass young stellar objects
• High Angular Resolution Measurement of Ion and Neutral Spectra as a Probe of the Magnetic Field Structure in DR21(OH)
• First polarimetry results of two candidate high-mass protostellar objects
• Magnetic Fields in Star-Forming Molecular Clouds IV. Polarimetry of the Filamentary NGC 2068 Cloud in Orion B
• Modeling the submillimeter emission from the Cepheus A young stellar cluster: Evidence for large scale collapse
• Young stars and dust in AFGL437: NICMOS/HST polarimetric imaging of an outflow source

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• Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
• Dispersion of Magnetic Fields in Molecular Clouds. I
• A Magnetized Jet from a Massive Protostar
• Misalignment of Magnetic Fields and Outflows in Protostellar Cores
• Magnetic fields during the early stages of massive star formation - I. Accretion and disk evolution
• The JCMT BISTRO Survey: The magnetic field strength in the Orion A filament
• Interferometric observations of magnetic fields in forming stars
• Anchoring Magnetic Field in Turbulent Molecular Clouds
• Cassiopeia A: dust factory revealed via submillimetre polarimetry
• Submillimeter and Far-Infrared Polarimetric Observations of Magnetic Fields in Star-Forming Regions
• A wide-angle outflow with the simultaneous presence of a high-velocity jet in the high-mass Cepheus A HW2 system
• A new probe of magnetic fields during high-mass star formation: Zeeman splitting of 6.7 GHz methanol masers
• MUSCLE W49 : A Multi-Scale Continuum and Line Exploration of the Most Luminous Star Formation Region in the Milky Way. I. Data and The Mass Structure of the Giant Molecular Cloud
• Resolving the polarized dust emission of the disk around the massive star powering the HH~80-81 radio jet
• Evolution of Magnetic Fields in High Mass Star Formation: SMA dust polarization image of the UCHII region G5.89-0.39
• New Results on the Submillimeter Polarization Spectrum of the Orion Molecular Cloud
• The JCMT BISTRO Survey: Magnetic Fields Associated with a Network of Filaments in NGC 1333
• A technique for constraining the driving scale of turbulence and a modified Chandrasekhar-Fermi method
• SMA observations of the polarized dust emission in solar-type Class 0 protostars: the magnetic field properties at envelope scales
• Magnetic fields in star formation: a complete compilation of all the DCF estimations
• First observations of the magnetic field inside the Pillars of Creation: Results from the BISTRO survey
• HI 21-cm absorption and unified schemes of active galactic nuclei
• Statistical Assessment of Shapes and Magnetic Field Orientations in Molecular Clouds through Polarization Observations
• Submillimeter Polarization of Galactic Clouds: A Comparison of 350 micron and 850 micron Data
• The JCMT BISTRO Survey: The Distribution of Magnetic Field Strengths towards the OMC-1 Region
• Five New High-Redshift Quasar Lenses from the Sloan Digital Sky Survey
• Revealing the diverse magnetic field morphologies in Taurus dense cores with sensitive sub-millimeter polarimetry
• A metallicity-spin temperature relation in damped Lyman-$\alpha$ systems
• Hot Core, Outflows and Magnetic Fields in W43-MM1 (G30.79 FIR 10)
• EVN observations of 6.7 GHz methanol maser polarization in massive star-forming regions III. The flux-limited sample
• Multi-generation massive star-formation in NGC3576
• Magnetic Field Properties in High Mass Star Formation from Large to Small Scales - A Statistical Analysis from Polarization Data
• Zooming into the Collimation Zone in a Massive Protostellar Jet
• Magnetic field regulated infall on the disc around the massive protostar Cepheus A HW2
• Hubble Space Telescope NICMOS Polarization Observations of Three Edge-on Massive YSOs
• Spectrum and ionization rate of low energy Galactic cosmic rays
• Bok globule CB17: Polarization, extinction and distance
• 1.3mm polarized emission in the circumstellar disk of a massive protostar
• Mid-Infrared Polarization of Herbig Ae/Be Discs
• A Study of Radio Polarization in Protostellar Jets
• Search for Alignment of Disk Orientations in Nearby Star-Forming Regions: Lupus, Taurus, Upper Scorpius, $\rho$ Ophiuchi, and Orion
• Magnetic field geometry of the large globule CB 34
• Characterization of Turbulence from Submillimeter Dust Emission
• Aligned grains and inferred toroidal magnetic fields in the envelopes of massive young stellar objects
• Dense gas and exciting sources of the molecular outflow in the AFGL 437 star-forming region
• Massive Star Formation, Outflows, and Anomalous H2 Emission in Mol 121 (IRAS 20188+3928)
• The spatial correlation between CN line and dust continuum emitting regions in high-mass star-forming cloud
• Dust destruction by the supernova remnant forward shock in a turbulent interstellar medium
• Far-infrared Polarization of the Supernova Remnant Cassiopeia A with SOFIA HAWC+
• Obtaining strength of magnetic field from E and B modes of dust polarization
• Evidence for the gravity-driven and magnetically-regularized gas flows feeding the massive protostellar cluster in Cepheus A