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社评“18xxnx 美国”-环球时报

国际最新天文18xxnx 美国学研究:银河系超大质量黑洞附近发现双星系统

来源: 房天下
2024-12-18 14:15:32

最佳回答

“18xxnx 美国”国际最新天文18xxnx 美国学研究:银河系超大质量黑洞附近发现双星系统

  中新18xxnx 美国网北京12月18日电 (18xxnx 美国记者 孙自法)施普林格自然旗下学术期刊《自然-通讯》最新发表一篇天文学论文称,研究人员在银河系中心的超大质量黑洞附近发现的一个双星系统,即两颗恒星围绕同一重心,被引力彼此约束。

本项研究成果相关示意图。(图片来自:欧洲南方天文台Stphane Guisard)

  论文作者指出,天文学界对这类系统虽然早已有所预测,但一直未能检测到。本项研究发现为银河系超大质量黑洞人马座A*(Sagittarius A*)附近的恒星动力学和演化带来了新的见解。

  该论文介绍,人马座A*被高速恒18xxnx 美国星和尘埃天体环绕,它们被统称为S星团(S-cluster)。天文学家预测S星团中存在双星系统,但此前尚未探测到。过去的研究认为,由于恒星与人马座A*的相互作用,这类恒星不太可能稳定存在。

本次研究成果相关示意图。(图片来自:欧洲南方天文台F. Peißker et al.)

  在本项研究中,论文第一作者兼通讯作者、德国科隆大学Florian Peißker和同事及合作者一起,他们利用甚大望远镜和凯克望远镜的档案数据,首次在S星团里探测到一个双星系统。该系统被称为D9,由双星D9a和D9b组成,形成年龄相对较轻,距今预计约270万年,可能形成于S星团的外部。

  论文作者开展进一步分析表明,这一双星系统在S星团内的稳定期已经走到尽头,由于黑洞的影响,双星系统的两个部分可能会在较近的未来合并。

这幅图像显示新发现的双星D9的位置,它正围绕着人马座A*运行。(图片来自欧洲南方天文台F. Peißker et al., S. Guisard)

  他们总结认为,对D9的探测表明,这类双星系统在从S星团外迁移到内部后,能够在星团里存续约100万年。该研究发现为了解人马座A*轨道上恒星的潜在演化路径带来了新的见解。(完)

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