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  研究人员观察到了一个连接两个星系团的暗物质细桥,利用引力透镜测量了其质量。报告发表在最新一期的《自然》杂志上。看不见的暗物质被认为占了宇宙物质的八成,其存在可通过扭曲光线推断出。但一般情况下暗物质细丝质量太低而难以观察到引力透镜现象。

  研究人员研究了连接星系团Abell 222和Abell 223的长18兆秒差距的暗物质细丝,检查了超过4万个背景星系发出的光的扭曲情况,计算出暗物质细丝的质量介于6.5 × 1013到9.8 × 1013倍太阳质量之间。

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