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NEAR-INFRARED POLARIZATION IMAGES OF THE ORION NEBULA

机译:猎户座星云的近红外极化图像

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摘要

Wide-field (~8' x 8') and deep near-infrared (JHK_s bands) polarization images of the Orion Nebula are presented. These data revealed various circumstellar structures as infrared reflection nebulae (IRNe) around young stellar objects (YSOs), both massive and low-mass. We found the IRN around both IRc2 and BN to be very extensive, suggesting that there might be two extended ( > 0.7 pc) bipolar/monopolar IRNe in these sources. We discovered at least 13 smaller scale (~0.01-0.1 pc) IRNe around less massive YSOs, including the famous source θ~2 Ori C. We also suggest the presence of many unresolved ( < 690 AU) systems around low-mass YSOs and young brown dwarfs showing possible intrinsic polarizations. Wide-field infrared polarimetry is thus demonstrated to be a powerful technique in revealing IRNe and hence potential disk/outflow systems among high-mass to substellar YSOs.
机译:呈现了猎户星云的宽视场(〜8'x 8')和近红外(JHK_s波段)偏振图像。这些数据揭示了围绕恒星和低质量的年轻恒星物体(YSO)周围的各种星际结构,如红外反射星云(IRNe)。我们发现IRc2和BN周围的IRN非常广泛,表明在这些源中可能存在两个扩展的(> 0.7 pc)双极/单极IRNe。我们在质量较轻的YSO周围发现了至少13个较小规模的(约0.01-0.1 pc)IRNe,包括著名的来源θ〜2 OriC。我们还建议在低质量YSO周围存在许多未解析的系统(<690 AU)。年轻的棕矮星显示出可能的内在极化。因此,广域红外极化技术被证明是揭示IRNe的有效技术,因此可以揭示高质量的亚星际YSO潜在的磁盘/流出系统。

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