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Characterization of Turbulence from Submillimeter Dust Emission

Chitsazzadeh, Shadi and Houde, Martin and Hildebrand, Roger H. and Vaillancourt, John (2012) Characterization of Turbulence from Submillimeter Dust Emission. Astrophysical Journal, 749 (1). p. 45. ISSN 0004-637X. doi:10.1088/0004-637X/749/1/45.

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In this paper, we use our recent technique for estimating the turbulent component of the magnetic field to derive the structure functions of the unpolarized emission as well as that of the Stokes Q and U parameters of the polarized emission. The solutions for the structure functions to 350 μm SHARP polarization data of OMC-1 allow the determination of the corresponding turbulent correlation length scales. The estimated values for these length scales are 9".4 ± 0".1, 7".3 ± 0".1, 12".6 ± 0".2 (or 20.5 ± 0.2, 16.0 ± 0.2, and 27.5 ± 0.4 mpc at 450 pc, the adopted distance for OMC-1) for the Stokes Q and U parameters, and for the unpolarized emission N, respectively. Our current results for Q and U are consistent with previous results obtained through other methods and may indicate presence of anisotropy in magnetized turbulence. We infer a weak coupling between the dust component responsible for the unpolarized emission N and the magnetic field B from the significant difference between their turbulent correlation length scales.

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Additional Information:© 2012 American Astronomical Society. Received 2011 November 19; accepted 2012 February 5; published 2012 March 20. M.H.’s research is funded through the NSERC Discovery Grant, Canada Research Chair, Canada Foundation for Innovation, Ontario Innovation Trust, and Western’s Academic Development Fund programs. The CSO is funded through NSF AST 05-40882. This work has also been supported in part by NSF grants AST 05-05230, AST 02-41356, and AST 05-05124.
Funding AgencyGrant Number
Canada Research ChairUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Innovation TrustUNSPECIFIED
Western’s Academic Development Fund programsUNSPECIFIED
NSFAST 05-40882
NSFAST 05-05230
NSFAST 02-41356
NSFAST 05-05124
Subject Keywords:ISM: clouds; ISM: magnetic fields; polarization; turbulence
Issue or Number:1
Record Number:CaltechAUTHORS:20120503-095452138
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Official Citation:Characterization of Turbulence from Submillimeter Dust Emission Shadi Chitsazzadeh et al. 2012 ApJ 749 45
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31290
Deposited By: Jason Perez
Deposited On:03 May 2012 22:54
Last Modified:09 Nov 2021 19:49

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