狮子座CW星周围的贝壳和弧线
(原标题: Shells and Arcs around Star CW Leonis)
2023-07-17
浏览次数: 18
这颗恒星周围发生了什么？没人能确定。CW狮子座是最近的碳星，由于内部核聚变导致大气中的碳分散，这颗恒星呈现橙色。但是CW狮子座似乎也被一个富含碳的气态星云吞没了。是什么导致了星云的复杂性尚不清楚，但它的壳和弧的几何形状肯定是有趣的。哈勃太空望远镜拍摄的这张特色图片详细描述了这种复杂性。碳星表面的低重力增强了它们将碳和碳化合物排入太空的能力。其中一些碳最终形成了在年轻恒星形成区域的星云和星系盘中常见的暗尘埃。人类和所有地球上的生命都是以碳为基础的，至少我们的一些碳可能曾经在类似碳星的濒死恒星的大气中循环。
查看原文解释
What's happening around this star? No one is sure. CW Leonis is the closest carbon star, a star that appears orange because of atmospheric carbon dispersed from interior nuclear fusion. But CW Leonis also appears engulfed in a gaseous carbon-rich nebula. What causes the nebula's complexity is unknown, but its geometry of shells and arcs are surely intriguing. The featured image by the Hubble Space Telescope details this complexity. The low surface gravity of carbon stars enhances their ability to expel carbon and carbon compounds into space. Some of this carbon ends up forming dark dust that is commonly seen in the nebulas of young star-forming regions and the disks of galaxies. Humans and all Earth-based life are carbon-based, and at least some of our carbon was likely once circulating in the atmospheres of near-death stars like carbon stars.