彗星小球
(原标题: Cometary Globules)
2024-07-16
浏览次数: 17
这些不寻常的星际结构是什么？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，朝向南边的船帆座和天王星的边界。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（左上）的头部附近有一个小小的红色辉光，这是一颗恒星形成初期的高能射流的迹象。
查看原文解释
What are these unusual interstellar structures? Bright-rimmed, flowing shapes gather near the center of this rich starfield toward the borders of the nautical southern constellations Pupis 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 (on the upper left) sports a small reddish glow near its head, a telltale sign of energetic jets from a star in the early stages of formation.
© Mark Hanson & Martin Pugh, Observatorio El Sauce