CG 30：彗星小球
(原标题: CG 30: Cometary Globules)
2026-04-28
浏览次数: 1557
它们就像山峰，但它们正在形成恒星。明亮的边缘，流动的形状聚集在这片丰富的星场的中心附近，朝着南边的船尾星座和船帆星座的边界。由星际气体和尘埃组成，这组光年大小的彗星球距离我们大约1300光年。来自附近热恒星的高能紫外线塑造了这些球体，并电离了它们明亮的边缘。这些球状物也从船帆座超新星遗迹中流出，这可能影响了它们的后掠形状。在它们内部，低温气体和尘埃的核心可能会坍缩，形成低质量的恒星，这些恒星的形成最终会导致球状体分散。事实上，彗星球状体cg30（该组右上方）的头部有一个小小的红色辉光，这是恒星形成初期高能射流的迹象。
查看原文解释
They're like mountain peaks, but they are forming stars. Bright-rimmed, flowing shapes gather near the center of this rich starfield toward the borders of the nautical southern constellations Puppis and Vela. Composed of interstellar gas and dust, the grouping of light-year sized cometary globules is about 1300 light-years distant. Energetic ultraviolet light from nearby hot stars has molded the globules and ionized their bright rims. The globules also stream away from the Vela supernova remnant which may have influenced their swept-back shapes. Within them, cores of cold gas and dust are likely collapsing to form low mass stars whose formation will ultimately cause the globules to disperse. In fact, cometary globule CG 30 (upper right in the group) sports a small reddish glow inside its head, a telltale sign of energetic jets from a star in the early stages of formation.
© Marcelo Salemme