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Tracing the Magnetic Field in Molecular Clouds

Houde, Martin and Peng, Ruisheng and Yoshida, Hiroshige and Hildebrand, Roger H. and Dowell, C. Darren and Phillips, Thomas G. and Dotson, Jessie L. and Bastien, Pierre and Vaillancourt, John E. (2005) Tracing the Magnetic Field in Molecular Clouds. In: Astronomical Polarimetry: Current Status and Future Directions. ASP Conference Series. No.343. Astronomical Society of the Pacific , San Francisco, CA, pp. 154-159. ISBN 1-58381-210-5.

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We discuss how the combination of polarimetry and ion-to-neutral molecular line width ratio measurements permits the determination of the orientation of the magnetic field in the weakly ionized parts of molecular clouds. Polarimetry measurements give the field orientation in the plane of the sky, and the ion-to-neutral molecular line width ratio determines the angle between the magnetic field and the line of sight. We present the results obtained with this technique on the M17 and Orion A star-forming regions using Hertz 350 μm polarimetry maps and HCO^(+)-to-HCN molecular line width ratios to provide the first view of the spatial orientation of the magnetic field these molecular clouds.

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Additional Information:© 2005 Astronomical Society of the Pacific. The Caltech Submillimeter Observatory is funded by the NSF through contract AST 9980846 and the observations made with Hertz were supported by NSF Grants AST 9987441 and AST 0204886.
Funding AgencyGrant Number
NSFAST 9987441
NSFAST 0204886
NSFAST 9980846
Series Name:ASP Conference Series
Issue or Number:343
Record Number:CaltechAUTHORS:20110811-140131809
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24813
Deposited On:11 Aug 2011 22:56
Last Modified:03 Oct 2019 03:00

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