猎户座BN/KL区的近红外圆偏振测量和相关图：二向色消光的贡献
Near-Infrared Circular Polarimetry and Correlation Diagrams in the Orion BN/KL Region: Contribution of Dichroic Extinction
摘要：
我们给出了猎户座BN/KL星云在Ks波段的深圆偏振图像，以及圆偏振、线偏振和代表消光的H-Ks颜色的相关性。圆偏振的图像清楚地显示了大质量恒星IRc 2周围的四极结构，而不是BN。H-Ks颜色与圆偏振有很好的相关性。本文导出了二向色性消光、色余、圆偏振和线偏振之间的简单关系。所观察到的斯托克斯参数和颜色过剩之间的相关性同意与导出的关系，并建议在这个区域中的圆偏振的生产的二向色消光的主要贡献，表明广泛存在的对齐的晶粒。
英文摘要：
We present a deep circular polarization image of the Orion BN/KL nebula in the Ks band and correlations of circular polarization, linear polarization, and H-Ks color representing extinction. The image of circular polarization clearly reveals the quadrupolar structure around the massive star IRc2, rather than BN. H-Ks color is well correlated with circular polarization. A simple relation between dichroic extinction, color excess, circular and linear polarization 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 circular polarization in this region, indicating the wide existence of aligned grains.
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