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        Near-infrared circular polarimetry and correlation diagrams in the Orion Becklin-Neugebauer/Kleinman-low region: contribution of dichroic extinction

        Author
        Fukue, T.
        Tamura, M.
        Kandori, R.
        Kusakabe, N.
        Hough, J.
        Lucas, P.W.
        Bailey, J.
        Whittet, D.C.B.
        Nakajima, Y.
        Hashimoto, J.
        Nagata, T.
        Attention
        2299/2945
        Abstract
        We present a deep circular polarization (CP) image of the Orion Becklin-Neugebauer (BN)/Kleinman-Low (KL)nebula in the K-s band and correlations of CP, linear polarization (LP) and H-K-s color representing extinction. The CP image clearly reveals the quadrupolar structure around the massive star IRc2, rather than BN. H-K-s color is well correlated with CP. A simple relation between dichroic extinction, color excess, CP and LP is derived. The observed correlation between the Stokes parameters and the color excess agrees with the derived relation, and suggests a major contribution of dichroic extinction to the production of CP in this region, indicating the wide existence of aligned grains.
        Publication date
        2009
        Published in
        The Astrophysical Journal
        Published version
        https://doi.org/10.1088/0004-637x/692/2/L88
        Other links
        http://hdl.handle.net/2299/2945
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