Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21711207c&link_type=abstract
American Astronomical Society, AAS Meeting #217, #112.07; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
We present maps of the plane-of-sky magnetic field within two regions of the Taurus molecular cloud: one in the dense core L1495 and the other in a diffuse region for comparison. The field direction is measured from the polarization of background starlight seen through the cloud. Because our data are at near-infrared wavelengths, we are able to measure the polarization even in the densest portion of L1495. In this region, we find that the percentage polarization increases with column density, suggesting that the dust grains are aligned with the magnetic field to some significant depth in the cloud rather than grain alignment being confined to a thin surface layer. This is in contrast to some previous results in Taurus and other regions, but is consistent with a more recent analysis that showed that grain alignment by means of radiative torques could explain a correlation between polarization percentage and column density.
This work was supported by the Jet Propulsion Laboratory, California Institute of Technology and NSF grant AST-090930.
Chapman Nicholas L.
Clemens Dennis
Goldsmith Paul
Li Daming
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