Detection of submillimeter polarization in the Orion nebula

Astronomy and Astrophysics – Astronomy

Scientific paper

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Interstellar Radiation, Orion Nebula, Polarized Electromagnetic Radiation, Radio Astronomy, Submillimeter Waves, Far Infrared Radiation, Linear Polarization, Polarimetry

Scientific paper

Linear polarization has been observed in the submillimeter radiation (270 microns) from two regions of Orion: one centered in the Kleinmann-Low nebula and one centered 1.5 arcmin south of the nebula. The observations were performed in September of 1983 and January of 1984 with the NASA Kuiper Airborne Observatory (KAO). The polarizations measured for the two regions were both 1.7 percent, plus or minus 0.4 and 0.5 percent, respectively. The angle of the outflow from both sources was 27 degrees, plus or minus seven degrees. An upper limit for polarization in the submillimeter radiation from the nebula W3(OH) was established at 1.6 percent. The observational data are compared with results from several other recent polarimetric observations of Orion, and some of their implications are discussed.

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