MAGNETIC FIELD PROPERTIES IN HIGH-MASS STAR FORMATION FROM LARGE TO SMALL SCALES: A STATISTICAL ANALYSIS FROM POLARIZATION DATA

@article{Koch2010MAGNETICFP,
  title={MAGNETIC FIELD PROPERTIES IN HIGH-MASS STAR FORMATION FROM LARGE TO SMALL SCALES: A STATISTICAL ANALYSIS FROM POLARIZATION DATA},
  author={Patrick M. Koch and Ya-Wen Tang and Paul T. P. Ho},
  journal={The Astrophysical Journal},
  year={2010},
  volume={721},
  pages={815-827}
}
Polarization data from high-mass star formation regions (W51 e2/e8, Orion BN/KL) are used to derive statistical properties of the plane of sky projected magnetic field. Structure function and auto-correlation function are calculated for observations with various resolutions from the BIMA and SMA interferometers, covering a range in physical scales from ~70 mpc to ~2.1 mpc. Results for the magnetic field turbulent dispersion, its turbulent-to-mean field strength ratio, and the large-scale… Expand

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References

SHOWING 1-10 OF 50 REFERENCES
Magnetic fields in massive star-forming regions
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 inExpand
EVOLUTION OF MAGNETIC FIELDS IN HIGH-MASS STAR FORMATION: LINKING FIELD GEOMETRY AND COLLAPSE FOR THE W51 e2/e8 CORES
We report our observational results of 870 μm continuum emission and its linear polarization in the massive star formation site W51 e2/e8. Inferred from the linear polarization maps, the magneticExpand
High-angular Resolution Dust Polarization Measurements: Shaped B-field Lines in the Massive Star-forming Region Orion BN/KL
We present observational results of the thermal dust continuum emission and its linear polarization in one of the nearest massive star-forming sites Orion BN/KL in Orion Molecular Cloud-1. TheExpand
ANCHORING MAGNETIC FIELD IN TURBULENT MOLECULAR CLOUDS
One of the key problems in star formation research is to determine the role of magnetic fields. Starting from the atomic intercloud medium which has density n H ~ 1 cm–3, gas must accumulate from aExpand
The Average Magnetic Field Strength in Molecular Clouds: New Evidence of Super-Alfvénic Turbulence
The magnetic field strength in molecular clouds is a fundamental quantity for theories of star formation. It is estimated by Zeeman splitting measurements in a few dense molecular cores, but itsExpand
Interferometric Mapping of Magnetic Fields in Star-forming Regions. I. W51 e1/e2 Molecular Cores
We present the first interferometric polarization map of the W51 e1/e2 molecular cores, obtained with the Berkeley-Illinois-Maryland Association (BIMA) array at 1.3 mm wavelength, with approximatelyExpand
Magnetic Fields in the Formation of Sun-Like Stars
We report high-angular-resolution measurements of polarized dust emission toward the low-mass protostellar system NGC 1333 IRAS 4A. We show that in this system the observed magnetic field morphologyExpand
Studies of Regular and Random Magnetic Fields in the ISM: Statistics of Polarization Vectors and the Chandrasekhar-Fermi Technique
Polarimetry is extensively used as a tool to trace the interstellar magnetic field projected on the plane of sky. Moreover, it is also possible to estimate the magnetic field intensity fromExpand
Interferometric Mapping of Magnetic Fields in Star-forming Regions. II. NGC 2024 FIR 5
We present the —rst interferometric polarization maps of the NGC 2024 FIR 5 molecular core, obtained with the BIMA array at approximately 2A resolution. We measure an average position angle of [60i ^Expand
Far-Infrared and Submillimeter Polarization of OMC-1 Evidence for Magnetically Regulated Star Formation
This paper presents large-scale polarization maps (8' × 8') of the Orion molecular cloud (OMC-1) at far-infrared (100 μm; 35'' resolution) and submillimeter (350 μm; 18'' resolution) wavelengths. TheExpand
...
1
2
3
4
5
...