DR 21:: A major star formation site revealed by Spitzer
DR 21:: A major star formation site revealed by Spitzer
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DOI：
10.1086/422817
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发表时间：
2004-09-01
影响因子：
8.7
通讯作者：
Stapelfeldt, K
中科院分区：
文献类型：
--
作者：
Marston, AP;Reach, WT;Stapelfeldt, K
我们使用斯皮策太空望远镜上的红外阵列相机（IRAC）和斯皮策多波段成像光度计（MIPS）仪器获得了被遮蔽的大质量恒星形成区DR 21的图像。我们的图像覆盖面积超过半平方度。IRAC和MIPS前所未有的高灵敏度和分辨率使我们能够首次揭示该地区的复杂性。我们的图像显示了从一个致密的物质盘中延伸出来的外流。先前观察到的从DR 21中心流出的分子在我们的图像中清晰可见，并且嵌入明显从DR 21流出的扩散细丝的更大区域中。斯皮策在8和24妈妈看到的该地区的许多点源都非常模糊，本质上是红色的。我们讨论了这些极红的物体的性质，并指出它们很可能是I类或更早的原恒星。观测到的其他特征包括中红外乌云，偶尔会出现极红色物体的扫过特征，包括DR 21以南15 pc长的南北灯丝。
We have obtained images of the obscured massive star-forming region DR 21 using both the Infrared Array Camera (IRAC) and Multiband Imaging Photometer for Spitzer (MIPS) instruments aboard the Spitzer Space Telescope. Our images cover an area of more than half a square degree. The unprecedented high sensitivity and resolution of both IRAC and MIPS allow us to reveal the complexity of this region for the first time. Our images show extended outflows from a dense disk of material. Previously observed molecular outflows from the center of DR 21 are clearly visible in our images and are embedded in a much larger region of diffuse filaments apparently flowing out from DR 21. Many of the point sources in the region seen by Spitzer at 8 and 24 mum are both very obscured and intrinsically red. We discuss the properties of some of these extremely red objects and indicate that they are likely to be Class I or earlier protostars. Other features observed include mid-infrared dark clouds that occasionally appear as swept up features from extremely red objects, including a 15 pc long north-south filament to the south of DR 21 itself.