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这次会不会是外星人?地球收到11光年外神秘信号

2017-07-19 08:27:57   新华网

据外媒18日报道,波多黎各科学家公布,他们发现一段来自距地球约11光年外的“奇特信号”,由红矮星“罗斯128”(Ross 128)发射出来。学者认为这些信号并非来自本地射频干扰,这一表态让人们又再度对外星生命充满无限想象。

资料图:阿雷西博天文台(Arecibo Observatory)。图片来源:美联社

罗斯(Ross 128)是恒星中第11靠近太阳系的恒星系,它属于“低金属量星”,靠近银河的平面。天文学家历年来都是用阿雷西博天文台(Arecibo Observatory)来观测红矮星,这也是2016年之前世界上最大的单面口径电波望远镜。

波多黎各大学阿雷西沃分校行星适居性实验室研究团队一直在研究一系列小型、温度相对较低的红矮星。今年4、5月时发现,有些已知有行星环绕的红矮星首度出现不寻常的现象。红矮星中的罗斯128已经没有行星围绕,但研究人员却在格林威治标准时间5月13日时接收到奇特信号,并持续了10分钟左右。


资料图:红矮星示意图。图片来源:NASA

研究室主任曼德斯(AbelMendez)针对这段信号表示,最有可能的解释就是假设这星球上有外星人存在:“多频率准周期信号的非偏振脉动组成,且有非常强烈的散发式特征,团队又对其他星球做观测,也都未没发现相似情形,因此对罗斯128而言,这是个独一无二的电波。”

曼德斯表示,要解释这种特殊现象,有三种可能性,一、这是类似太阳耀斑(solar flare)的放射活动,二、可能是罗斯128观测范围中的其他物体出现放射活动,三、可能是高轨道卫星爆炸。

但由于信号位于11光年外,太过微弱,地球上的其他无线电天文望远镜较无法接收到,因此阿雷西沃天文台科学家将会携手地球外智能生物寻求计划(SETI)天文学家,通过艾伦望远镜数组(ATA)和绿堤天文望远镜(Green Bank Telescope)于23日晚间再度观测这颗星球,尽快做出最好的解释。

责任编辑:孙启浩 CN037
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