Star formation in bright-rimmed globules - Evidence for radiation-driven implosion
Star formation in bright-rimmed globules - Evidence for radiation-driven implosion
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明亮边缘小球中的恒星形成——辐射驱动内爆的证据
DOI：
10.1086/185491
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
K. Sugitani
中科院分区：
文献类型：
--
作者：
K. Sugitani
在IC1396的三个亮边球体Ori-I-2、L1206和Rim E中发现了分子外流。这些外流与没有光学对应物的冷IRAS源有关。他们是新近形成的明星的很好候选者。IRAS源与明亮的边缘之间只有0.1-0.2 pC的距离。电离锋面(明亮的边缘)之前的冲击波可以在短至10000年的时间内传播到IRAS源的位置。这表明恒星的形成是由围绕这些球体的电离/激波锋所触发的。这些数据与Klein等人在1980年提出的辐射驱动的恒星形成内爆模型一致。相关IRAS源的光度与球体质量的比值为3-13 L/M(太阳单位)，远高于孤立暗球体的亮度比0.03-0.3 L/M，这表明持续的辐射驱动内爆过程可能导致形成比孤立暗球体内更亮、更大质量的恒星。参考文献33篇。
Molecular outflows have been discovered in three bright-rimmed globules, Ori-I-2, L1206, and rim E in IC 1396, respectively. These outflows are associated with cold IRAS sources without optical counterparts. They are good candidates for recently formed stars. The IRAS sources are separated by only 0.1-0.2 pc from the bright rims. Shock waves preceding ionization fronts (bright rims) can propagate to the positions of the IRAS sources in times as short as several times 10,000 yr. This suggests that star formation was triggered by the ionization/shock fronts surrounding these globules. The data agree with the radiation-driven implosion model for star formation proposed in 1980 by Klein et al. The ratios of luminosity of the associated IRAS sources to globule mass, 3-13 L/M (solar units), are much higher than the values found for isolated dark globules, 0.03-0.3 L/M, indicating that the continuing radiation-driven implosion process may cause formation of more luminous and perhaps more massive stars than within isolated dark globules. 33 refs.