论文标题
星云的Spitzer irac颜色与星形形成区域相关
Spitzer IRAC Colors of Nebulae Associated with Star-Forming Regions
论文作者
论文摘要
恒星形成区域通常与雾化有关。在这项研究中，我们研究了Spitzer IRAC图像中的红外扩散发射。红外星云L1527追踪从低质量原子散发出的流出。 Nebular颜色与恒星光球的颜色一致，并具有较大的灭绝。 HII区域W5-East周围的星云在红外线上是明亮的。这些颜色与含有多环芳烃（PAH）的灰尘的模型颜色一致。星云的紫外线和小灰尘分数的紫外线辐射的强度是从星云的红外颜色中推导的。我们发现，星云的边缘被强紫外辐射辐射，并具有丰富的小灰尘。人们认为，分子云表面的灰尘被早期型恒星的紫外线辐射摧毁。
Star-forming regions are often associated with nebulosity. In this study, we investigated infrared diffuse emission in Spitzer IRAC images. The infrared nebula L1527 traces outflows emanating from a low-mass protostar. The nebular color is consistent with the color of a stellar photosphere with large extinction. Nebulae around the HII region W5-East are bright in the infrared. These colors are consistent with the model color of dust containing polycyclic aromatic hydrocarbon (PAH). The strength of ultraviolet irradiation of the nebulae and the small dust fraction were deduced from the infrared colors of the nebulae. We found that the edges of the nebulae are irradiated by strong ultraviolet radiation and have abundant small dust. Dust at the surface of the molecular cloud is thought to be destroyed by ultraviolet radiation from an early-type star.
