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已知最遥远星系中发现氧元素
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两个不同天文学家团队借助阿塔卡马大型毫米波/亚毫米波阵列(ALMA),在已知最遥远的星系 JADES-GS-z14-0 中发现了氧元素。这一发现将促使天文学家重新思考早期宇宙中星系形成的速度。JADES-GS-z14-0 于2024年由韦伯太空望远镜发现,是迄今为止确认的最遥远星系,距地约 134 亿光年,这意味着人们看到的是其宇宙年龄仅为 3 亿年(大爆炸后3亿年)时的样子。新发现的氧气表明,该星系的化学成熟度远超预期。星系通常在生命伊始就充满了年轻的恒星,这些恒星主要由氢和氦等轻元素构成。随着恒星的演化,它们会产生氧等重元素,这些元素在恒星死亡后被散布到其所在的星系中。研究人员曾认为,在宇宙 3 亿岁时,它仍然太年轻,不可能有富含重元素的星系。然而这两项新研究表明,JADES-GS-z14-0的重元素含量比预期高出约10倍。
科技日报:最遥远星系中发现氧元素



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已知最遥远星系中发现氧元素
#太空

两个不同天文学家团队借助阿塔卡马大型毫米波/亚毫米波阵列(ALMA),在已知最遥远的星系 JADES-GS-z14-0 中发现了氧元素。这一发现将促使天文学家重新思考早期宇宙中星系形成的速度。JADES-GS-z14-0 于2024年由韦伯太空望远镜发现,是迄今为止确认的最遥远星系,距地约 134 亿光年,这意味着人们看到的是其宇宙年龄仅为 3 亿年(大爆炸后3亿年)时的样子。新发现的氧气表明,该星系的化学成熟度远超预期。星系通常在生命伊始就充满了年轻的恒星,这些恒星主要由氢和氦等轻元素构成。随着恒星的演化,它们会产生氧等重元素,这些元素在恒星死亡后被散布到其所在的星系中。研究人员曾认为,在宇宙 3 亿岁时,它仍然太年轻,不可能有富含重元素的星系。然而这两项新研究表明,JADES-GS-z14-0的重元素含量比预期高出约10倍。
科技日报:最遥远星系中发现氧元素

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