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首页> 外文期刊>The Astrophysical journal >SPITZER OBSERVATIONS OF IC 2118
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SPITZER OBSERVATIONS OF IC 2118

机译:IC 2118的微调镜观察

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IC 2118, also known as the Witch Head Nebula, is a wispy, roughly cometary, ~5 degree long reflection nebula, and is thought to be a site of triggered star formation. In order to search for new young stellar objects (YSOs), we have observed this region in seven mid- and far-infrared bands using the Spitzer Space Telescope and in four bands in the optical using the U. S. Naval Observatory 40 inch telescope. We find infrared excesses in four of the six previously known T Tauri stars in our combined infrared maps, and we find six entirely new candidate YSOs, one of which may be an edge-on disk. Most of the YSOs seen in the infrared are Class II objects, and they are all in the "head" of the nebula, within the most massive molecular cloud of the region.
机译:IC 2118,也称为巫婆头星云,是一个稀疏的,大致彗星状的〜5度长的反射星云,被认为是触发恒星形成的场所。为了搜索新的年轻恒星物体(YSO),我们已经使用Spitzer太空望远镜在七个中红外和远红外波段以及使用美国海军天文台40英寸望远镜在光学的四个波段中观察到了该区域。我们在合并的红外图中发现了六颗先前已知的T Tauri星中的四颗中的红外过剩,并且发现了六种全新的候选YSO,其中之一可能是边缘盘。红外中看到的大多数YSO是II类物体,它们都位于该区域最庞大的分子云内的星云“头部”。

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