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社评“37大但人文艺术A级都市天气”-知识课堂

国际最新天文学研37大但人文艺术A级都市天气究:“萤火虫闪烁”揭示宇宙早期星系形成

来源: 新华社
2024-12-13 07:55:13

最佳回答

“37大但人文艺术A级都市天气”国际最新天文学研37大但人文艺术A级都市天气究:“萤火虫闪烁”揭示宇宙早期星系形成

  中新37大但人文艺术A级都市天气网北京12月12日电 37大但人文艺术A级都市天气(记者 孙自法)国际著名学术期刊《自然》最新发表一篇天文学论文显示,在宇宙约6亿年时形成的37大但人文艺术A级都市天气小质量星系“萤火虫闪烁”(Firefly Sparkle)的详细观测数据为早期星系形成提供了新知。这一研究结果基于韦布空间望远镜(JWST)的观测数据,或增进人们对银河系演化的理解。

  该论文介绍,目前人类能探测到的最遥远的星系来自宇宙只有当前年龄约5%的时候。不过,这些星系的质量只有银河系的约万分之一,而且这么小的质量使它们很难被观测到。

论文中的本次研究成果相关图示。施普林格自然 供图

  在本项研究中,论文共同通讯作者、美国韦尔斯利学院Lamiya Mowla和哥伦比亚大学Kartheik Iyer与合作者一起,对最早由哈勃空间望远镜发现“萤火虫闪烁”星系利用JWST观测到的新细节,带来了对该星系形成过程的新认知。他们利用光谱学和引力透镜(大质量前景天体让来自遥远距离的光线发生弯曲的现象),该星系的红移值据估为8.3,诞生于宇宙生命最初的6亿年。

  论文作者还观测到两个相邻星系,并命名为“萤火虫的好友”(Firefly-Best Friend)以及“萤火虫的新好友”(Firefly-New Best Friend),这两个星系分别距离“萤火虫闪烁”6000光年和4万光年,比当前的银河系要小。他们研究推断,“萤火虫闪烁”在其早期形成阶段或许是一个年轻、有大量气体的星系。

  论文作者总结指出,“萤火虫闪烁”的质量集中在10个恒星簇,其总质量大约是太阳质量的1000万倍。这使得“萤火虫闪烁”成为在宇宙早期(星系刚开始形成的时期)观测到的分解成恒星簇的最小质量星系之一,其质量与原生银河系相似。

  《自然》同期发表同行专家的一篇“新闻与观点”文章认为,虽然该项研究的数据无法确定“萤火虫闪烁”星系和它的“好友们”的命运,但研究这些银河系的可能前身为理解银河星的形成过程提供了线索。(完)

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