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arXiv 0810.2803astro-ph
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测量小麦哲伦云核心坍缩超新星遗迹1 E 0102.2-7219中的尘埃产生

Measuring Dust Production in the Small Magellanic Cloud Core-Collapse Supernova Remnant 1E 0102.2-7219

Karin M. Sandstrom, Alberto D. Bolatto, Snezana Stanimirovic, Jacco van Loon, J. D. T. Smith

备注：
submitted to ApJ
发表信息：
Astrophys.J.696:2138-2154,2009
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摘要：

本文利用斯皮策太空望远镜的红外光谱仪对小麦哲伦星云中的超新星遗迹1 E 0102.2-7219进行了中红外光谱成像观测。残余物显示氖和氧的精细结构跃迁的发射以及来自尘埃的连续发射。中红外尘埃辐射与X射线、无线电和光学波长观测的比较表明，尘埃与超新星喷出物有关，因此是在残骸中新形成的。新形成的尘埃的光谱可以通过一个模型很好地再现，该模型包括70 K时3 × 10 ^-3太阳质量的无定形碳尘埃和145 K时2 × 10 ^-5太阳质量的Mg 2SiO 4（镁橄榄石）。我们的观测对残留物中的尘埃量设定了一个下限，因为我们对未受冲击的喷出物中的冷尘埃不敏感。我们将我们的结果与其他核心坍缩超新星和遗迹的观测结果进行了比较，特别是Cas A，其中已经进行了非常相似的光谱映射观测。我们在E 0102中观察到的尘埃比在Cas A中观察到的少约10倍，尽管无定形碳和镁橄榄石的量相当。

英文摘要：

We present mid-infrared spectral mapping observations of the core-collapse supernova remnant 1E 0102.2-7219 in the Small Magellanic Cloud using the InfraRed Spectrograph (IRS) on the Spitzer Space Telescope. The remnant shows emission from fine structure transitions of neon and oxygen as well as continuum emission from dust. Comparison of the mid-IR dust emission with observations at x-ray, radio and optical wavelengths shows that the dust is associated with the supernova ejecta and is thus newly formed in the remnant. The spectrum of the newly formed dust is well reproduced by a model that includes 3x10^-3 solar masses of amorphous carbon dust at 70 K and 2x10^-5 solar masses of Mg2SiO4 (forsterite) at 145 K. Our observations place a lower limit on the amount of dust in the remnant since we are not sensitive to the cold dust in the unshocked ejecta. We compare our results to observations of other core-collapse supernovae and remnants, particularly Cas A where very similar spectral mapping observations have been carried out. We observe a a factor of ~10 less dust in E 0102 than seen in Cas A, although the amounts of amorphous carbon and forsterite are comparable.

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