Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21533203c&link_type=abstract
American Astronomical Society, AAS Meeting #215, #332.03; Bulletin of the American Astronomical Society, Vol. 42, p.430
Astronomy and Astrophysics
Astronomy
Scientific paper
In order to study the role magnetic fields play in molecular clouds and star formation, we present optical and infrared polarization measurements in Taurus. The optical data have been previously published by Heiles (2000), although the infrared data are new. The optical polarization data show a remarkable correlation with our CO maps (Goldsmith et al. 2008), suggesting that the dust, which produces the polarization, and the gas, which has most of the mass, are coupled. With our 12CO and 13CO we are able to make reliable estimates of the cloud density. These densities are necessary for our estimates the plane-of-sky magnetic field strength using both Chandrasekhar-Fermi and the recent method described in Hildebrand et al. (2009). Both methods produce similar estimates for the magnetic field strength, though the Hildebrand results are typically larger. Lastly we compare the polarization percentage and magnetic field strength as a function of column density. This work was supported by the Jet Propulsion Laboratory, California Institute of Technology.
Chapman Nicholas L.
Clemens Dennis
Goldsmith Paul
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