Dispersion of Magnetic Fields in Molecular Clouds. I

Details Dispersion of Magnetic Fields in Molecular Clouds. I Dispersion of Magnetic Fields in Molecular Clouds. I

2008-11-05

arxiv.org/abs/0811.0813v2

Astrophys.J.696:567-573,2009

Astronomy and Astrophysics

Astrophysics

19 pages, 2 figures, 1 table, accepted for publication in the ApJ

Scientific paper

10.1088/0004-637X/696/1/567

We describe a method for determining the dispersion of magnetic field vectors about large-scale fields in turbulent molecular clouds. The method is designed to avoid inaccurate estimates of magnetohydrodynamic or turbulent dispersion - and help avoiding inaccurate estimates of field strengths - due to large-scale, non-turbulent field structure when using the well-known method of Chandrasekhar and Fermi. Our method also provides accurate, independent estimates of the turbulent to large-scale magnetic field strength ratio. We discuss applications to the molecular clouds OMC-1, M17, and DR21(Main).

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