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银河系中心的龙卷风
#太空

在银河系中心区域的狂暴环境中,环绕着我们银河核心超大质量黑洞的尘埃与气体不断翻搅,强烈的震波在其中扩散。国际团队利用阿塔卡马大型毫米次毫米波阵列(ALMA),将我们对这一剧烈活动的观测解析度提升了100倍,并在这片神秘的宇宙区域发现了一种全新的丝状结构。这些细长丝状结构与任何恒星形成区域都没有空间上的对应关系。它们是在一氧化矽(SiO)及其他八种分子的发射谱线中偶然发现的,且视线速度具有一致性,与气体外流的特征并不相符。因此,它们与过去发现的高密度气体丝状结构有所不同。此外,这些丝状结构与尘埃辐射并无关联,也未处于流体静力平衡状态。这些细长丝状结构在物质循环过程中扮演的重要角色,它们就像是宇宙龙卷风——剧烈流动,迅速消散,并有效地将物质输送到周围环境中。目前仍不清楚这些细长丝状结构的起源,但研究团队推测,震波作用是最可能的形成机制。
天文館:銀河系中心的「宇宙龍捲風」 NRAO:Astronomers Discover “Space Tornadoes” Around the Milky Way’s Core



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银河系中心的龙卷风
#太空

在银河系中心区域的狂暴环境中,环绕着我们银河核心超大质量黑洞的尘埃与气体不断翻搅,强烈的震波在其中扩散。国际团队利用阿塔卡马大型毫米次毫米波阵列(ALMA),将我们对这一剧烈活动的观测解析度提升了100倍,并在这片神秘的宇宙区域发现了一种全新的丝状结构。这些细长丝状结构与任何恒星形成区域都没有空间上的对应关系。它们是在一氧化矽(SiO)及其他八种分子的发射谱线中偶然发现的,且视线速度具有一致性,与气体外流的特征并不相符。因此,它们与过去发现的高密度气体丝状结构有所不同。此外,这些丝状结构与尘埃辐射并无关联,也未处于流体静力平衡状态。这些细长丝状结构在物质循环过程中扮演的重要角色,它们就像是宇宙龙卷风——剧烈流动,迅速消散,并有效地将物质输送到周围环境中。目前仍不清楚这些细长丝状结构的起源,但研究团队推测,震波作用是最可能的形成机制。
天文館:銀河系中心的「宇宙龍捲風」 NRAO:Astronomers Discover “Space Tornadoes” Around the Milky Way’s Core

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