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arXiv 0710.2135astro-ph
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IC 4406:无线电-红外视图

IC 4406: a radio-infrared view

L. Cerrigone, J. L. Hora, G. Umana, C. Trigilio

摘要:

IC 4406是一个巨大的(约100“x 30”)南半球双极行星状星云,由两个从明亮的中心区域延伸出来的细长叶组成,有证据表明那里存在一个巨大的气体和尘埃环。我们展示了IRAC(斯皮策太空望远镜)和澳大利亚望远镜紧凑阵列对这个源的新观测。射电图表明,电离气体的通量集中在明亮的中心区域,起源于以前在H_α观测到的团簇结构,而在红外图像中,在扩展的星云包层中可以看到细丝和团簇,中心区域显示出环形发射。对红外辐射的模拟得出的结论是,星云中存在几种尘埃成分。

英文摘要:

IC 4406 is a large (about 100'' x 30'') southern bipolar planetary nebula, composed of two elongated lobes extending from a bright central region, where there is evidence for the presence of a large torus of gas and dust. We show new observations of this source performed with IRAC (Spitzer Space Telescope) and the Australia Telescope Compact Array. The radio maps show that the flux from the ionized gas is concentrated in the bright central region and originates in a clumpy structure previously observed in H_alpha, while in the infrared images filaments and clumps can be seen in the extended nebular envelope, the central region showing toroidal emission. Modeling of the infrared emission leads to the conclusion that several dust components are present in the nebula.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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