Submillimeter Polarimetry of the Orion Molecular Cloud

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We present far-infrared and submillimeter polarization maps of the Orion Nebula. Maps at 100 mu m with 35" resolution are compared with maps at 350 mu m and 450 mu m with 16" resolution. We present empirical relationships that show a systematic decrease of polarization with optical depth, but a systematic increase of polarized flux with optical depth. The polarization is also seen to increase with wavelength. There is good pixel to pixel uniformity in the polarization angles and smooth systematic structure on scales of 2-5 arc minutes. The angle of polarization is uniform over the KL infrared peak and the polarized flux is greatest on the ridge connecting the KL peak and the southern submillimeter source.

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