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独特的是,第二个“无暗物质星系”出现在凯克天文台暗物质技术上。_高鹰生殖中心

来源: 新华社
08:56:59

夜天子独特的是,第二个“无暗物质星系”出现在凯克天文台暗物质技术上。

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    资料来源:北京科技日报3月31日电(记者张梦兰),第一个“无暗物质星系”自发现以来一直受到质疑,但现在又出现了另一个同类星系。根据耶鲁大学研究小组最近的一份报告,第二个已知的没有暗物质的星系已经被发现,最近的两项研究表明暗物质实际上可以与星系分离。这个结论颠覆了人们以前的理解。暗物质是如此神秘,以至于组成它的粒子甚至不包含在所谓的规范模型中。目前,暗物质被认为是解释宇宙中星系运动的关键,因此对于大多数星系来说,暗物质是主要的物质类型。例如,在我们的星系中,暗物质大约是正常物质的30倍。对于质量高于或低于银河系的星系,这个比例也会增加,例如暗物质的矮星系是正常物质的400倍。然而,去年,耶鲁天文学家彼得范多卡姆的团队报告了NGC1052-DF2星系(以下简称为DF2)的发现,该星系的质量基本上与可见恒星的表观质量相同,意味着它不包含暗物质。这一发现违背了人们的普遍理解,引起了广泛的批评和怀疑。在首次发表的研究中,研究小组证实了他们对df2星系的观测结果。利用凯克天文台收集到的更精确的测量数据,他们发现星系中的球状星团的确以与正常星系质量相同的速度移动。如果暗物质存在于df2中,它会移动得更快。在第二项研究中,研究小组利用凯克天文台的低分辨率成像光谱仪(LRIS)找到了另一个没有暗物质的星系,称为NGC1052-DF4。研究人员说,发现第二个暗物质星系“严重不足或完全不存在”与最初发现DF2一样令人兴奋。因为这意味着有可能出现更多的“无暗物质星系”,它也显示了对星系形成的理解在很长一段时间内是非常肤浅的。他们希望这一发现将鼓励更多的科学家去解决这个难题。

zi liao lai yuan: bei jing ke ji ri bao 3 yue 31 ri dian ji zhe zhang meng lan, di yi ge" wu an wu zhi xing xi" zi fa xian yi lai yi zhi shou dao zhi yi, dan xian zai you chu xian le ling yi ge tong lei xing xi. gen ju ye lu da xue yan jiu xiao zu zui jin de yi fen bao gao, di er ge yi zhi de mei you an wu zhi di xing xi yi jing bei fa xian, zui jin de liang xiang yan jiu biao ming an wu zhi shi ji shang ke yi yu xing xi fen li. zhe ge jie lun dian fu le ren men yi qian de li jie. an wu zhi shi ru ci shen mi, yi zhi yu zu cheng ta de li zi shen zhi bu bao han zai suo wei de gui fan mo xing zhong. mu qian, an wu zhi bei ren wei shi jie shi yu zhou zhong xing xi yun dong de guan jian, yin ci dui yu da duo shu xing xi lai shuo, an wu zhi shi zhu yao de wu zhi lei xing. li ru, zai wo men de xing xi zhong, an wu zhi da yue shi zheng chang wu zhi di 30 bei. dui yu zhi liang gao yu huo di yu yin he xi de xing xi, zhe ge bi li ye hui zeng jia, li ru an wu zhi di ai xing xi shi zheng chang wu zhi di 400 bei. ran er, qu nian, ye lu tian wen xue jia bi de fan duo ka mu de tuan dui bao gao le NGC1052DF2 xing xi yi xia jian cheng wei DF2 de fa xian, gai xing xi de zhi liang ji ben shang yu ke jian heng xing de biao guan zhi liang xiang tong, yi wei zhe ta bu bao han an wu zhi. zhe yi fa xian wei bei le ren men de pu bian li jie, yin qi le guang fan de pi ping he huai yi. zai shou ci fa biao de yan jiu zhong, yan jiu xiao zu zheng shi le ta men dui df2 xing xi de guan ce jie guo. li yong kai ke tian wen tai shou ji dao de geng jing que de ce liang shu ju, ta men fa xian xing xi zhong de qiu zhuang xing tuan di que yi yu zheng chang xing xi zhi liang xiang tong de su du yi dong. ru guo an wu zhi cun zai yu df2 zhong, ta hui yi dong de geng kuai. zai di er xiang yan jiu zhong, yan jiu xiao zu li yong kai ke tian wen tai de di fen bian lv cheng xiang guang pu yi LRIS zhao dao le ling yi ge mei you an wu zhi di xing xi, cheng wei NGC1052DF4. yan jiu ren yuan shuo, fa xian di er ge an wu zhi xing xi" yan zhong bu zu huo wan quan bu cun zai" yu zui chu fa xian DF2 yi yang ling ren xing fen. yin wei zhe yi wei zhe you ke neng chu xian geng duo de" wu an wu zhi xing xi", ta ye xian shi le dui xing xi xing cheng de li jie zai hen zhang yi duan shi jian nei shi fei chang fu qian de. ta men xi wang zhe yi fa xian jiang gu li geng duo de ke xue jia qu jie jue zhe ge nan ti.

    

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