Statistics – Computation
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1205h&link_type=abstract
American Astronomical Society, AAS Meeting #211, #12.05; Bulletin of the American Astronomical Society, Vol. 39, p.750
Statistics
Computation
Scientific paper
Velocity anisotropy induced by MHD turbulence is investigated with computational simulations and molecular line observations of the Taurus Molecular Cloud. A new analysis method to evaluate the degree and angle of velocity anisotropy using spectroscopic image data of interstellar clouds is presented. The efficacy of this method is demonstrated on model observations derived from 3D velocity and density fields from the set of numerical MHD simulations that span a range of magnetic field strengths. The analysis is applied to 12CO imaging of a sub-field within the Taurus cloud. Velocity anisotropy is identified that is aligned within 7 degrees of the local magnetic field direction derived from optical polarization measurements. These results favor strong MHD turbulence within the low density, molecular gas substrate of the Taurus cloud.
This work was supported by NSF grants AST 0540852 and AST 0507315.
Brunt Christopher
Gong Haifeng
Heyer Mark H.
Ostriker Eve
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