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天文学家观测到一次异常强大的宇宙事件,他们认为这可能是黑洞撕裂一颗大质量伴星时引发的,释放的能量远超典型超新星。
一个黑洞撕碎了一颗巨大的恒星,引发了一场创纪录的爆炸,但天文学家在之后的发现可能更加不同寻常。

黑洞是宇宙中最具破坏力的天体之一,但天文学家如今观测到一种前所未有的宇宙暴力行为。
一项新发现似乎表明,一个黑洞正在撕裂一颗巨大恒星,引发的爆炸威力远超已知的所有恒星坍缩事件。

该事件被正式命名为AT2024wpp,昵称为惠比特,其短暂释放的能量相当于4000亿个太阳,远超典型超新星的威力,也比以往观测到的任何由恒星坍缩驱动的爆炸都要明亮。

研究人员认为,爆发开始于一颗巨大的恒星过于靠近一个黑洞。
黑洞的巨大引力拉伸并撕裂了这颗恒星,将一些物质吸入一个超热的圆盘。
当碎片向内螺旋运动时,它发出了强烈的X射线,并推动一股强大的风进入恒星在最终毁灭前释放的气体。

利物浦约翰摩尔斯大学天体物理学副教授、该研究的主要作者丹尼尔珀利在美国天文学会年会上描述了这一发现:我们发现了一个我们认为是黑洞正在与一颗大质量伴星并合的现象,将伴星撕裂成一个环绕黑洞的吸积盘。
这是一种罕见而令人惊叹的天文现象。

宇宙中破纪录的剧烈爆炸
天文学家此前曾观测到黑洞摧毁恒星的现象,这类事件被称为潮汐瓦解事件。
而惠比特之所以不同寻常,在于其规模、速度和亮度。
它还属于一种罕见的类别,称为明亮快速蓝光光学瞬变源(LFBOTs),这类天体在蓝光和紫外波段剧烈爆发,并比普通超新星更快地迅速变暗。

康奈尔大学天文学助理教授何安娜是这项研究的共同作者,她使用位于加利福尼亚州帕洛马天文台的兹威基瞬变设施在该物体的光到达地球后不久发现了Whippet。
一天之内,位于加那利群岛的利物浦望远镜和美国宇航局的斯威夫特卫星证实该物体呈现强烈的蓝色并产生X射线。

R.迈克尔里奇(加州大学洛杉矶分校)和秦宇靖(加州理工学院)的距离测量结果表明,该爆发的能量远超普通超新星。
其极高的温度与快速演化特征,更倾向于指向一颗恒星被黑洞撕裂并吞噬的过程。
尽管我们之前就有所怀疑,但这仍然非同寻常,佩尔利说,这次事件的能量比以往任何类似事件都要高出许多倍,也超过了目前已知的任何由恒星坍缩所驱动的爆炸。
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冲击波揭示恒星最后时刻
惠比特犬(Whippet)还揭示了天文学家通常无法直接观测到的现象:一颗濒死恒星周围隐藏的气体。
一道激波以约光速五分之一的速度向外传播,猛烈冲击其附近的致密物质,随后在大约半年后突然熄灭。
研究人员推测,激波之所以消退,是因为它抵达了恒星在最终爆发前抛射气体所形成的空腔的外缘。
blackholesfeedingprocessintoabrilliantdisplay.ThediskaroundtheblackholeproducedXraysandapowerfulgas"wind,"whichslammedintothestarsearlieroutflows.Thatcollisioncreatedtheblueopticalandultravioletglowseeninthefirstdays,followedbyradioandmillimetersignalslateron. translation黑洞的取食过程被surroundinggas转化成一个brilliantdisplay。
围绕blackhole的gas产生X射线和一个powerful气流,它与星oids的早期expuffs相撞。
这个碰撞创建了blue光学和ultravioletglow在第一天看到,随后radio和millimeter信号在后来days出现。
note这段text涉及天文学和科学概念,可能对某些人来说比较复杂。
在时,我遵循了原text的结构和逻辑,但简化了somescientificdetails以使其更易于理解。
一个至今仍挑战天文学家的谜团
Theteambelievesthiscouldbeastreamofmaterialpulledfromthestar’scoreastheblackholetoreitapart.Amorespeculativepossibilityisthatanotherobjectinthesystem,perhapsathirdstar,wasblastedbytheblackhole’sparticlewindandXrayradiation.
一个由吸积到黑洞上的物质所驱动、极其明亮且快速演化的紫外瞬变源
相关知识
黑洞是宇宙中一种引力极强的天体,其引力强大到连光都无法逃脱。
它由大质量恒星在生命末期发生引力坍缩形成。
黑洞的中心称为奇点,周围存在一个事件视界,一旦物质或光线进入这个边界,就无法返回。
BY: Liverpool John Moores University
FY: AI
如有相关内容侵权,请在作品发布后联系作者删除
说实话,我自己上学那会儿物理就没学明白,时间、空间、引力这些概念,脑子里只剩一团浆糊。
想给孩子讲几句吧,又怕讲错了、误人子弟;不讲吧,又不想打击孩子的好奇心。
尤其现在孩子上了小学中高年级,对科学的好奇心正是最旺盛的时候。
每天追着问"为什么",那股劲儿其实特别珍贵。
可咱们当家长的,确实不是万能的百科全书,很多科普知识自己都搞不清楚,更别说用孩子能听懂的话讲出来了。
我一开始也想给孩子买书,结果在书店翻了半天,越翻越没底。
那些宇宙科普书,要么是密密麻麻的专业术语,孩子翻两页就没了兴趣;要么图倒是漂亮,讲得却浮于表面,读完啥也没记住。
后来一个当老师的朋友给我推荐了一本《跟着霍金看宇宙》,我拿到手自己先翻了一遍,还真被惊艳到了。
这本书最大的好处,就是它真的站在孩子的认知水平上去讲宇宙,一点不端着。
先说它怎么讲黑洞。
书里没有上来就甩一堆公式,而是从霍金爷爷是怎么发现黑洞、怎么理解黑洞讲起,用特别形象的比喻,让孩子能"看见"黑洞在做什么。
我家孩子看完竟然主动跟我讲"黑洞就像宇宙里的贪吃怪",虽然不太准确,但那股理解和记忆的劲儿,可比死记硬背强太多了。
再说时间旅行这个更抽象的话题。
很多成年人一听都觉得玄乎,但这本书把它讲得特别接地气。
孩子看完恍然大悟,还跟我说"原来时间也会被引力拉慢呀"。
这种孩子能亲口讲出来的理解,正是我最看重的。
我觉得这本书特别适合几类孩子。
一种是那种天生爱问"为什么"、对天文特别感兴趣的孩子,能给他们一个很扎实的入门;另一种是平时不太爱看书、觉得科学枯燥的孩子,这本书的讲述方式能让他们重新觉得"原来科学这么有意思";还有一种就是咱们这些想陪孩子一起读、却自己也不太懂的家长,带着孩子一起看,正好补补课,还能顺便聊聊天。
书里的插图也很用心,结构清晰,读起来完全不费劲。
我家孩子现在每天睡前都要主动翻几页,还经常跑来给我"讲课"。
这种亲子共读的时光,可比看平板刷手机有意义多了。
而且这本书的定价也很实在,几十块钱就能给孩子打开一扇望向宇宙的窗,让孩子知道霍金爷爷那些听起来高深的理论,其实离我们并不遥远。
如果你也在为孩子选一本靠谱的宇宙科普入门书,或者发愁怎么跟孩子聊"时间""空间""黑洞"这些话题,我真的挺推荐这一本的。
能让孩子主动读、读得懂、还愿意开口讲的科普书,说实话真不多见。
趁着孩子对宇宙的好奇心正热乎,早一点给他一本合适的读物,早点点燃那颗探索的小火苗,说不定就种下了他未来仰望星空的种子呢。
这本书我自己翻过一遍,之所以敢放心推荐,还有一个很重要的原因——它讲科学,却不只是把知识倒给孩子,而是带着一种"陪孩子一起好奇"的温度。
霍金爷爷那套关于宇宙的想法,在书里被讲得既严谨又好懂,孩子读着不觉得吃力,家长陪着读也不觉得枯燥。
很多家长会纠结,孩子这么小,看这种书是不是太早了?其实恰恰相反,越早接触,越能在孩子心里种下对科学的好感。
等将来上了中学真正学物理的时候,孩子想起小时候读过的这本书,那些抽象的概念就会变得亲切起来,学起来也更省力。
如果要说一点小小的不足,那就是这本书需要家长稍微陪读几页,帮孩子把节奏带起来。
不过一旦孩子自己入了迷,后面你就会发现他根本停不下来了,天天追着你讨论外星人存不存在、宇宙有没有尽头。
总的来说,一本能让孩子主动去翻、读得懂又愿意开口讲的宇宙科普书,真的很难得。
如果你也想让孩子在这个好奇心爆棚的年纪,接触一点真正有意思、也有营养的知识,这本《跟着霍金看宇宙》是个非常不错的开始。
趁孩子这份好奇心还在,早一点把这本书带回家,说不定哪一天,他抬起头看星空的眼神,就不一样了。
代号金刚计划,一万六千多名大陈百姓被迫离开世代居住的海岛,远赴台湾。
当年很多人以为只是短暂逃难,盼着早日返乡,却没想到海峡相隔,一别就是数十年。
一、一江山岛解放,大陈岛门户洞开1955年1月18日,中国人民解放军发起了陆、海、空三军首次联合作战,一举攻克了大陈岛北方的重要屏障——一江山岛。
一江山是大陈岛的北部屏障,这一失守,大陈岛彻底暴露在解放军火力之下,防守已经没有现实可能。
国民党当局内部研判,大陈守不住;美国方面也拒绝直接出兵协防大陈。
在美台协商之下,敲定撤退方案,代号金刚计划,由蒋经国亲自赴大陈岛现场指挥,计划把岛上驻军、全部平民一并撤离,迁往台湾地区。
二、金刚计划下的举岛迁徙1955年2月8日‑12日,撤退正式执行,台湾当局不仅派出了其海军最精锐的指挥官以及几乎全部主力舰艇,总计56艘;而美军第七舰队则派出了包括航空母舰、重型巡洋舰、驱逐舰、各型运输舰在内的57艘舰艇。
当时岛上绝大多数是世代捕鱼为生的普通渔民,很多人并不想离开故土。
国民党当局下达命令:岛上居民必须全部随军撤离,不许留下一人。
1955年2月9‑14日,共计16487名大陈及附属岛屿居民,分批乘船抵达台湾基隆港,从此背井离乡,离开了祖祖辈辈生活的海岛。
老百姓来不及收拾家产、来不及告别祖坟、来不及带走祖辈基业。
不少人临走前在门板写下“暂时离开,很快回来”,心里以为只是短暂逃难。
三、抵达台湾之后来到台湾之后,这批人被称为“大陈义胞”,初期安置条件十分艰苦。
先临时安置在学校、礼堂,几十人挤在一处;之后当局在基隆、宜兰、花莲、台东、高雄、屏东等12个县市,兴建了35个专门的住宅区,称为“大陈新村”。
大陈人讲台州方言,既不通国语,也不会闽南语,在当地很难融入,早期形成相对封闭的社群。
由于居住相对集中,大陈人在新家园里较好地保留了来自浙江台州地区的方言、食饼筒、年糕等饮食习惯以及渔师庙等民间信仰,形成了独特的文化群落。
随着时代变迁,第一代大陈人渐渐老去,后代在台湾落地生根,如今大陈后裔总数约十几万,很多人依旧保留着台州的乡土记忆,保留着家乡的习俗、方言记忆。
四、两岸解冻之后,回乡寻根1987年台湾开放民众赴大陆探亲,大批大陈后代终于能够回到台州大陈岛寻根祭祖。
近些年,回乡寻根的,早已不只是当年的迁台亲历者。
大量二代、三代、四代大陈后裔组团回岛。
每年台州、大陈岛都会举办两岸大陈乡情文化交流、故土行、青年故乡行活动。
有人抄写族谱、记录乡情,把大陈故事带回台湾、代代传承。
大陈义胞经过两代、三代繁衍,涌现出不少政界、民间社团、商界知名人士,多数都曾回台州大陈岛寻根祭祖。
除了叶匡时、罗智强、徐庆元、梁文杰、柯受良、胡志伟,你还知道哪些生活在台湾的大陈岛后裔? 这一段历史,不只是军事撤退,更是无数普通家庭悲欢离合的缩影,也成为两岸同胞血脉相连的一段历史见证。
庆幸的是大陈岛在1956年迎来了青年志愿垦荒队,开启了重获新生的垦荒岁月。
非常感谢您的阅读,如果喜欢,欢迎在评论区留下你的想法,咱们一起交流探讨~