English
聯系我們
網站地圖
郵箱
舊版回顧



【光明日報】我國科研人員發現66億光年外獨特信號

文章來源:光明日報 常河   發布時間:2019-04-12  【字號:     】  

  借助美國宇航局的錢德拉空間望遠鏡所完成的當今世界上最深最靈敏的X射線巡天觀測——七百萬秒錢德拉南天深場,中國科學技術大學薛永泉教授等人發現了一個持續約7小時的獨特X射線輻射信號,這個信號來自約66億光年外。各種關鍵觀測數據均表明,該信號極有可能源于雙中子星合并之后產生的磁星。

  中子星是宇宙中最為神奇的天體之一,它幾乎全部由中子組成,具有超高密度(為水密度的上億倍)、超強磁場(為地表磁場的上億倍)等極端物理屬性,是檢驗基本物理規律極佳的天然實驗室。然而,迄今為止,人們對于中子星自身基本屬性的認識還是相對模糊的。例如,在宇宙中時有發生的雙中子星合并會產生什么?

  主流的研究觀點認為雙中子星合并之后直接產物是黑洞。但南京大學戴子高教授等人最早預言,若中子星壓強隨核物質密度的變大而顯著增加,則雙中子星合并會產生新的特殊的中子星——磁星。

  磁星,表面磁場比目前人類實驗室能制造出來的最強磁場還強上億倍。它具有超高的自轉速度,每秒自轉幾百上千周。由于磁星的快速自轉,即使它的質量超過中子星質量上限,其離心力也能幫助它短期抗衡自身的強大引力,因而不會坍縮成黑洞。

  雙中子星合并會釋放強烈的引力波輻射,同時還會在周邊拋出大量物質。磁星具有強引力,快速吸入拋出物質,并在兩極方向產生一個只持續幾秒鐘的超高速、準直的噴流。假如噴流方向恰好對著地球,地球附近就能在短時間內探測到大量的高能量伽瑪射線,即天體物理所稱的短伽瑪暴。同時,磁星還會產生持續時間較長的基本各向同性的X射線爆發,可在偏離噴流的方向被探測到。

  中國科學技術大學領銜的研究團隊觀測到了這種以前只存在于理論猜想中的新型X射線信號,在國際上首次證實了雙中子星并合直接產物可以是磁星。該成果于4月11日在線發表在《自然》雜志。

  這一發現證實了雙中子星并合直接產物可以是大質量毫秒磁星,排除了一批核物質模型,明確了一系列關于中子星物態方程與極高磁場強度等基本物理特質,進而深化了對中子星基本屬性的認識。

  即使沒有看到短伽瑪暴,人們也能通過磁星的X射線輻射來了解雙中子星合并以及中子星自身的更多秘密。來自66億光年外的光輝,為未來的引力波探測和中子星研究帶來新的方向。

  中國科大物理學院天文系薛永泉是該論文的第一兼通訊作者,其碩士研究生鄭學琛與美國內華達大學張冰教授為論文共同通訊作者,北京大學李曄博士與紫金山天文臺吳雪峰研究員等人為論文主要作者。

  (原載于《光明日報》 2019-04-12 08版)




(責任編輯:侯茜)

附件:

專題推薦

相關新聞


© 1996 - 中國科學院 版權所有 京ICP備05002857號  京公網安備110402500047號  聯系我們

地址:北京市三里河路52號 郵編:100864

爱米彩www.am7654.com www.086595.com | www.552063.com | www.643997.com | www.673643.com | www.806472.com | 722576.com | 博亿彩票www.636by.com | 575734.com | www.357022.com | www.675521.com | cp9666.cc | 002933.com | www.40086.com | 亿彩www.6832x.com | www.2165.cc | www.61527.cc | www.2375.win | www.303023.com | www.828967.com | www.7838.loan | www.026476.com | www.hf29.com | www.51753.cc | www.373807.com | www.778410.com | www.41ke.com | www.23392.com | www.dc65.com | 012860.com | www.224677.com | www.20vd.com | www.64mv.com | www.58375.com | www.198276.com | www.85124.com | 877389.com | www.7691.pw | www.69533.com | www.1786.cc | www.84645.com | 874364.com | 882208.com | www.054.date | www.542018.com | www.698337.com | www.pw5.cc | www.131670.com | www.568952.com | 360229.com | www.51651.com | www.566908.com | 500彩票www.303480.com | www.155748.com | 易彩集团www.25688l.com | www.250025.com | www.079578.com | www.747368.com | www.958830.com | www.538515.com | 126642.com | www.538571.com | www.85676.com | www.229553.com | www.344033.com | www.888500.cc | 幸运彩票www.444215.com | www.365.red | www.83993.cc | www.092238.com | www.697891.com | 357385.com | 45888.cc | www.644733.com | 250072.com | www.98819.cc | www.977325.com | www.he29.com | www.08020.com | www.gn78.com | www.5626.biz | www.105346.com | 821139.com | 639084.com | www.0892.biz | www.cai4644.com | 526417.com | 069563.com | 761409.com | www.mf3.cc | www.kd40.com | www.108703.com | www.81rw.com | www.190159.com | www.793092.com | www.385.red | www.130289.com | 361843.com | 779805.com | 799811.com | 017274.com | www.548795.com | www.824163.com | www.114421.com | 500彩票www.202429.com | www.82024.com | www.679636.com | www.500955.cc | 720650.com | www.410926.com | 598205.com | 791201.com | www.1950.vip | www.440790.com | 918002.com | 745198.com | www.784611.com | www.274716.com | 99彩票www.994948.com | www.112830.com | www.254296.com | www.710156.com | www.jr04.com | www.75683.cc | www.553107.com | www.073921.com | www.440114.com | www.706170.com | www.881469.com | www.941180.com | www.665175.com | www.677122.com | 128530.com | www.333.me | 汇丰彩票www.871203.com | www.485477.com | www.966824.com | www.31788.cc | www.3898.name | www.504971.com | www.954918.com | www.837.org | www.7415.com | 775555.com | 709645.com | www.031758.com | www.176009.com | www.220548.com | www.jg52.com | www.970746.com | 918彩票网www.918li.com | 梦想彩票站www.43131x.com | www.2yc.com | www.63pj.cc | www.199710.com | www.419557.com | www.29xh.com | www.2666.date | www.992351.com | 350796.com | 9205.com | www.976089.com | www.781870.com | www.607326.com | 网易彩票www.506232.com | www.918922.com | www.074291.com | www.176921.com | www.824525.com | www.673706.com | 973346.com | www.136970.com | www.522531.com | www.715705.com | www.323444.com | www.952533.com | www.4518.org | www.209653.com | www.909374.com | www.t75.com | www.kx02.com | www.81ru.com | www.85678.cc | www.894.net | www.0798.cc | www.41392.com | www.128816.com | www.283811.com | www.586174.com | www.217300.com | 亚洲彩www.68568x.com | www.08lx.com | www.1408.cm | www.440709.com | www.737558.com | www.985146.com | 026032.com | www.403688.cc | www.sk08.com | www.6245.xyz | www.100508.com | www.540160.com | www.146203.com | www.02vh.com | 564099.com | www.807313.com | 973249.com | www.012815.com | www.012601.com | www.875348.com | www.36854.com | www.971748.com | www.67424.com | www.095545.com | www.085324.com | www.661243.com | www.447316.com | www.qu13.com | www.880664.com | 331676.com | www.83ks.com | 500彩票www.596531.com | www.27eo.com | www.290896.com | www.17895.cc | 567443.com | 563031.com | 045795.com | 651405.com | www.dk27.com | www.65221.cc | www.407.pw | www.ma90.com | www.21867.cc | www.001892.com | 798597.com | www.266438.com | www.365484.cc | www.445653.com | www.132926.cc | www.d51.club | www.38vt.com | www.300407.com | www.050084.com | www.551135.com | www.913605.com | www.403469.com | www.299708.com | www.77036.com | www.ke37.com | www.161657.com | www.671031.com | 150175.com | www.7865.top | www.822823.cc | 281041.com | 356752.com | www.ij97.com | gn52.com | www.250899.com | 151975.com | uk31.com | www.974675.com | www.143618.com | www.267774.com | www.27781.com | www.151079.com | www.172006.com | www.033443.com | www.212290.com | www.180573.com | www.nk2.com | www.94072.com | www.201861.com | www.61gj.com | www.91cv.com | www.19hj.com | www.059928.com | www.93444.com | www.613385.com | www.380208.com | www.594822.com | www.346400.com | www.537510.com | 635508.com | www.328287.com | www.712108.com | 486577.com | 585531.com | www.448499.com | www.0758.bid | www.194614.com | www.248281.com | www.122785.com | www.150292.com | 741963.com | www.897672.com | www.95937.cc | 500彩票网www.290252.com | www.0531.live | www.170992.com | www.174811.com | www.081777.com | 189234.com--189234.com | www.17ug.com | www.048555.com | 490553.com | www.t39.club | www.77919.com | www.191944.com | 178819.com | 120048.com | 740277.com | www.25513.cc | www.480109.com | www.9276.vip | www.255603.com | www.nr32.com | www.334.biz | www.000527.com | www.053247.com | www.31sj.com | www.973834.com | www.55164.com | www.370206.com | www.ng9.com | www.cai9999.cc | www.108507.com | www.745778.com | www.633905.com | www.076981.com | www.505495.com | 962374.com | www.864141.com | 博乐彩票www.388229.com | www.5464.pw | www.661409.com | www.xv72.com | www.998.org | www.04432.com | www.282342.com | www.263175.com | www.067359.com | www.583757.com | www.570276.com | www.281691.com | www.58957.com | www.627544.com | www.024513.com | www.015080.com | www.026594.com | www.76579.cc | 820025.com | 568643.com | www.65199.cc | www.370539.com | 689845.com | www.655772.com | www.kh99.com | www.57dx.com | www.852166.com | 907014.com | www.560873.com | 439178.com | www.cp846.com | www.762295.com | www.zl29.com | www.5931.bid | www.994.cm | www.657093.com | www.651708.com | www.676688.com | www.725785.com | www.a79.cc | www.00988.com | www.1993.me | www.16211.com | www.278983.com | www.652528.com | 375432.com | 购彩票www.c6078.com | www.969699.com | www.011036.com | www.683215.com | www.134802.com | www.887360.com | www.06435.com | www.3782.com | www.85037.com | www.1565.org | www.76en.com | www.940095.com | 089367.com | 376660.com | www.gg01.com | www.355169.com | www.947445.com | 957412.com | 357361.com | www.8922.wang | www.1099.com | www.2222.loan | www.gx53.com | www.456873.com | www.802969.com | www.0596.xyz | www.34796.com | www.3593.biz | www.52ip.cc | www.1762.wang | www.53178.com | www.wh8.cc | www.128296.com | www.708899.cc | www.292386.com | www.950086.com | www.588667.com | 462005.com | www.134989.com | 948285.com | cp769.cc | 980472.com | www.3092.biz | www.218739.com | www.10601.com | www.jb41.com | www.815373.com | www.126903.com | 大赢家彩票平台www.161570.com | www.72qr.com | www.449937.com | www.si27.com | www.tf25.com | www.kk05.cc | 804506.com | 356747.com | www.258748.com | www.96565.cc | www.39289.cc | www.08351.com | www.466153.com | www.199367.com | www.72382.com | 699239.cc | www.74nw.com | www.50852.com | 金掌柜www.83993q.com | www.215900.com | www.263.date | www.505558.com | ms18.com | www.185176.com | www.912779.com | www.732781.com | www.735663.com | www.178716.com | www.768958.com | www.6400.vip | www.91pn.cc | www.2001.space | www.016334.com | www.858507.com | www.cl21.com | www.cai7099.com | 83001.com | 197649.com | 大赢家彩票www.399160.com | www.562470.com | www.44785.com | www.958043.com | 110715.com | www.32.gg | www.29fd.com | www.wn70.com | www.9978.cc | www.560477.com | www.11279.cc | www.00493.com | www.871071.com | 53ry.com | 吉利彩票www.80065s.com | www.04216.com | www.991443.com | www.62297.com | www.631.net | www.971668.com | www.818226.com | www.713752.com | www.398921.com | www.zu61.com | www.69648.com | 806456.com | www.117766.com | www.875282.com | www.91of.com | www.3210.mobi | www.379692.com | www.412413.com | www.im69.com | www.0180.vip | www.006655.cc | www.097620.com | www.225682.com | www.110631.com | www.89775.cc | www.8041.xyz | www.232838.com | www.820652.com | 814367.com | www.779011.com | 273802.com | www.103994.com | www.358401.com | www.579689.com | www.649099.com | www.666661.com | www.739880.com | www.778484.com | www.946932.com | 中彩网www.6661f.cc | 975741.com | 974857.com | 679103.com | www.73769.cc | www.579178.com | www.213982.com | www.040468.com | 澳客网www.okw7.com | www.857685.com | www.30oi.com | www.965185.com | 356959.com | 664672.com | www.2108.cc | www.120447.com | 899673.com | 059933.com | www.85216.com | www.086098.com | www.750443.com | www.956512.com | www.wz72.com | www.5203.top | www.585026.com | www.659954.com | www.703989.cc | www.ij37.com | www.143320.com | www.631159.com | 百姓彩票www.bxcp3.com | www.165116.com | www.230269.com | www.410076.com | www.774111.com | www.631873.com | www.654376.com | www.717950.com | 692008.com | 762523.com | www.122530.com | 48346.cc | www.811966.com | www.yn00.com | www.174468.com | 82810a.com | www.602433.com | www.715876.com | www.51kg.com | www.103415.com | www.445544.cc | 310234.com | www.692339.com | www.727532.cc | www.111843.com | 891466.com | 113405.com | www.954538.com | 200503.com | www.04if.com | www.1979.biz | www.74733.com | www.543209.com | www.635010.com | www.252609.com | www.079093.com | 456843.com | www.656760.com | www.572913.com | 654883.com | 名门彩www.33997s.com | www.130790.com | www.3659.pw | www.015488.com | www.123884.com | www.149349.com | 716587.com | www.55lv.com | www.782244.com | www.963.me | www.297846.com | www.088970.com | www.cp3779.com | www.6ag.com | www.cp5560.com | www.358496.com | www.113331.com | www.oa72.com | www.5985.cc | 616406.com | www.970026.com | www.713736.com | www.024943.com | www.uq57.com | www.903687.com | www.939303.com | www.71971.cc | www.119190.com | www.87997.com | www.669829.com | www.959578.com | www.233277.com | www.34uv.com | www.62jg.cc | www.82258.com | www.011669.com | www.198753.com | www.172113.com | www.924949.com | 244638.com | www.577101.com | www.434397.com | www.535452.com | 392496.com | www.cp433.com | www.82827.cc | www.067616.com | www.tg10.com | www.54ss.com | www.183582.com | www.558552.com | www.623250.com | www.879812.com | www.770810.com | www.ym31.com | www.161558.com | www.662429.com | 972646.com | www.70466.com | www.368765.com | www.671.live | www.d12.club | www.315680.com | 903056.com | www.733094.com | www.552927.com | www.973914.com | www.007240.com | www.340130.com | www.9853.org | www.567800.com | www.223006.com | 081898.com | 554343.com | www.8179.biz | 吉利彩票www.80065k.com | www.226503.com | www.958867.com | www.6734.vip | www.243243.com | www.802011.com | www.876462.com | www.431901.com | 496491.com | www.ly13.com | www.131419.cc | www.371293.com | www.635155.com | www.585217.com | www.tk533.com | www.994589.com | 087909.com | www.150114.com | www.507846.com | www.255703.com | www.375342.com | www.123173.com | www.62lw.com | www.978660.com | www.6583.cc | www.372117.com | www.9949.in | www.866553.com | www.184611.com | www.69005.com | www.219814.com | www.829311.com | 871192.com | www.wx05.cc | www.730926.com | www.297744.com | www.358460.com | www.965340.com | www.016410.com | www.757654.com | www.916501.com | www.294506.com | www.513165.com | www.72ti.com | www.289957.com | www.936277.com | www.7078.vip | 349152.com | www.513132.com | www.9652.me | www.93111.cc | www.197208.com | www.313865.com | www.344184.com | 845836.com | www.755375.com | www.27ro.com | 澳客彩票www.106ak.com | www.qy97.com | www.453441.com | www.572661.com | www.95751.com | www.9977.vip | www.iz78.com | 358379.com | www.923129.com | www.861720.com | www.u17.mobi | www.039911.com | www.005.live | www.fs64.com | 308115.com | www.530111.cc | 365581.cc | www.886250.com | www.717130.com | 935073.com | www.0940.biz | www.us43.com | www.745444.com | www.zm72.com | www.96856.com | 466589.com | www.8328.biz | www.7110.biz | www.942132.com | www.960641.com | 273185.com | 705663.com | www.0004111.com | www.26.cm | www.365978.cc | www.503676.com | www.828673.com | 972347.com | www.608943.com | www.md58.cc | www.181376.com | www.499439.com | www.296817.com | www.285137.com | 89678.cc | www.24229.com | www.341282.com | www.315607.com | www.741598.com | www.897672.com | www.927239.com | www.957410.com | 314009.com | www.5620.vip | www.34168.com | 490.cc | www.rv94.com | os63.com | www.754632.com | www.293682.com | www.41384.com | www.ja39.com | www.556791.com | www.311382.com | hj67.cc | 358346.com | www.036004.com | www.51.la | www.3645.xyz | www.095972.com | www.581357.com | www.571091.com | www.89235.com | www.5616.biz | www.9293.cc | www.222426.com | www.582069.com | 网易彩票www.083wy.com | www.6616.pw | www.05010.com | www.75bz.com | 624499.com | 561803.com | 469178.com | 019499.com |