Fragmentation of Globules in H II Regions: Hubble Space Telescope Images of Thackeray’s Globules
Fragmentation of Globules in H II Regions: Hubble Space Telescope Images of Thackeray’s Globules
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H II 区域中球体的破碎：哈勃太空望远镜拍摄的萨克雷球体图像
DOI：
10.1086/378363
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
S. Heathcote
中科院分区：
文献类型：
--
作者：
B. Reipurth;A. Raga;S. Heathcote
我们展示了哈勃太空望远镜WFPC2通过Hα滤光片对H II区南部IC 2944的Thackeray's球的图像。这些图像记录了小球复合物在其当前高度动态分裂阶段的状态。一群非常小且寿命很短的碎片表明，连续碎片在增加中性气体的表面质量比方面必须发挥重要作用，从而加速光蒸发和光消融过程。我们不能从各种理论机制中挑出哪一种在球体复合体中起作用。
We present Hubble Space Telescope WFPC2 images through an Hα filter of Thackeray's globules in the southern H II region IC 2944. The images document the state of the globule complex during its current highly dynamical phase of breakup. A population of very small and short-lived splinters suggests that continuous fragmentation must play an important role in increasing the surface-to-mass ratio of the neutral gas, thus accelerating the processes of photoevaporation and photoablation. We are not able to single out which of various theoretical mechanisms for breakup is operating in the globule complex.