English
聯系我們
網站地圖
郵箱
舊版回顧



守得“云”開見磁星

文章來源:科技日報   發布時間:2019-04-18  【字號:     】  

王國燕 何聰 制圖

  “一鉤新月天如水”,晴朗的夜空在人們的想象中,往往是寂靜祥和的。然而,在天文學家眼里,黑暗的宇宙卻到處埋藏著強力的定時炸彈,隨時隨地會猛然爆發。尤其是在人們開始在X射線、伽馬射線等極高能量的電磁波段觀察宇宙時,眾多的爆發事件就像四處綻放的煙火一樣熱鬧而迷人。這些爆發事件到底是什么?這個問題從上世紀60年代起就吸引了天文學家的好奇心。

  近日,在國際著名期刊《自然》雜志上,一項由中國科學技術大學研究人員主導的研究,就介紹了一個極有可能是由雙中子星并合產生的有趣的X射線爆發事件,并證實了其并合產物是幾十年前科學家預言的磁星。

  存在于理論中的強磁場天體

  中子星是比太陽還要重八倍以上的恒星死亡后留下的致密星體,它們體積超小,密度卻極高。由于宇宙中的恒星喜歡扎堆出現,兩個中子星攜手相伴的情況也時有發生。相互繞轉的雙中子星產生的引力場快速變化,就像是在不斷地攪拌原本平靜的時空,向外泛起漣漪。隨著能量的消耗,雙中子星會慢慢越靠越近,最終在劇烈碰撞、釋放引力波暴之后合二為一,形成一個新的質量更大的致密天體——2017年8月17日激光干涉引力波天文臺(LIGO)等就首次探測到了雙中子星并合引力波事件的信號。如果這個新天體的質量超過中子星的質量上限,那么天體內部物質的壓力將難以抗衡星體自身的引力,使得星體直接塌縮成為一個黑洞。但天文學家認為,在塌縮之前它很有可能會先形成一個更加有趣的天體——磁星。

  磁星,顧名思義,是一個具有超強磁場的中子星,其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。這樣的磁星可以擁有超高的自轉速度,每秒可自轉幾百上千周。由于高速自轉,即使磁星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強大的引力而不會進一步塌縮成黑洞。

  除了留下中心的磁星,并合事件還會在周邊留下大量的拋出物質。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的超高速噴流。如果噴流方向恰好對著地球,就如同它向我們開了一炮,可以讓我們在短時間內探測到大量的高能量伽馬射線,這就是被稱為短伽馬暴的高能天體物理事件。

  早在上個世紀90年代初,科學家就提出了磁星的設想。之后它逐漸被學界廣泛接受,并用于解釋一些特殊類型的中子星。然而時至今日,科學家仍未在雙中子星并合之后探測到它的“真身”。

  “烏云”遮蔽新天體輻射

  由于雙中子星并合既能產生強烈的引力波暴,也能產生短伽馬暴,所以天文學家非常希望在探測到引力波輻射以后,還能在對應的方向看到一個短伽馬暴,從而進一步研究并合事件中的各種物理過程,找到磁星。然而,由于噴流“開炮”的方向是隨機的,它恰好對準地球的可能性其實很小,所以即使引力波探測器已經探測到不少的引力波事件,想觀測到一個對應的短伽馬暴卻很難。

  但天文學家找到了另一種可能性。在理論預言中,磁星有一個重要的特點:較差自轉,即磁星的內部與外部的自轉速度并不一致,靠近中心區域的自轉速度更快。這就會不斷扭曲穿過磁星內部的磁力線,使其最終浮出磁星表面并斷裂,釋放出大量能量從而減緩磁星自轉,而還在磁星內部的磁力線則會重新連接并開始新一輪的扭轉。這種磁重聯過程能向四面八方發出大量的X射線波段至可見光波段的輻射。這樣,即使沒有看到短伽馬暴,科學家仍然有可能看到一個強烈的爆發事件,只不過是在X射線、可見光等波段。

  既然這樣的輻射是朝向四面八方發射的,那么是不是就應該很容易被觀測到呢?答案也是否定的。此前,人們還沒有發現過任何有類似特征的孤立X射線爆發。這是因為雙中子星并合中產生的拋出物質會形成一個圍繞著新天體的包層,擋住了來自中心的大部分輻射。看來,要想不通過短伽馬暴而僅靠探測X射線爆發來發現雙中子星并合事件、尋找磁星,還真是困難重重啊。

  不過,理論和數值模擬告訴我們,在中子星并合形成的磁星吸收周邊物質的時候,劇烈的吸積過程除了形成噴流以外還會產生高速的彌漫星風,而磁星周邊強大的磁場會成為這些星風的向導,將它們導向兩極。于是這些高速星風在磁星形成之初就會快速地吹走磁星兩極附近的遮擋物質,打開一個較大的通道,后續的X射線輻射就能借此沖破障礙。當我們的視線對著這個通道時,就有可能看到預言中的沒有對應短伽馬暴的孤立的X射線爆發,找到磁星。

  七百萬秒曝光中搜尋那次閃光

  中科大研究團隊4月11日在線發表于《自然》上的研究,正是報導了首例這樣的事件。

  錢德拉空間望遠鏡是目前世界上最先進的X射線探測器之一。在1999年到2016年間,它陸續對天空中精心選出的一小片僅有約1/4滿月大小的區域拍攝了102次,總計曝光7百萬秒。中科大研究團隊在研究該天區中天體的光變特性時,發現了2015年3月一個天體的X射線輻射從無到有,在短時間內增亮了上千倍。他們將這個爆發事件命名為CDF-S XT2(簡稱XT2)。而在隨后的數據搜尋中,他們發現在XT2爆發前后,世界上的伽馬射線探測器都沒有記錄到對應的伽馬暴。

  通過分析XT2的X射線數據,研究人員發現,它在爆發后約2000秒內亮度基本不變,隨后則快速變暗直至消失。而得益于錢德拉空間望遠鏡的超高角分辨率,研究人員將XT2定位于距離地球約66億光年的一個星系的外圍部分。這些特征都符合科學家對磁星的理論預期。研究人員估計了觀測到類似XT2爆發事件的頻率,發現與此前根據引力波探測結果可靠估算得到的雙中子星并合事件的發生頻率吻合得很好,從而再次證明了XT2源于雙中子星并合的合理性。

  根據上述分析,研究人員相信它就是一直被苦苦追尋的大質量毫秒磁星X射線爆發。這讓天文學家興奮不已。長久以來只存在于理論預言中的現象,如今終于出現。XT2的發現證明了雙中子星并合能夠產生磁星的理論正確性,同時幫助天文學家更為深入地了解了中子星的內部物質狀態。而且,這一發現有助于科學家在未來的引力波事件探測中,擺脫對伽馬暴的依賴,通過X射線觀測直接獲知其來源天體的物理信息。

  略為遺憾的是,因為發現時間較晚,研究人員錯過了在XT2爆發之后立刻調用其他望遠鏡對它進行后續觀測的機會,所以無法得到爆發過程中更多的其他信息。但可以期待的是,在未來的X射線巡天望遠鏡的監測中,科學家將有機會看到更多的類似爆發事件。XT2作為宇宙深處磁星X射線輻射沖過層層云靄到達我們的曙光,將給未來的引力波探測、中子星研究帶來新的希望。

  (作者:鄭學琛、薛永泉,分別系荷蘭萊頓大學博士生、中國科學技術大學天文系教授)




(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

凤凰彩票www.aa3479.com www.924914.com | 015732.com | 80991.com | 785096.com | www.qn86.com | www.05bs.cc | www.01988.com | www.178219.com | www.85qg.com | www.201500.com | www.333021.cc | www.618460.com | 903629.com | www.019285.com | www.7874.vip | www.1368.pw | www.21552.com | www.7513.cn | www.65xq.com | www.45938.com | www.0251.xyz | www.920157.com | www.650040.com | 105969.com | 379851.com | www.453668.com | www.572511.com | www.636699.com | www.961114.com | 877463.com | 950742.com | 030552.com | 855432.com | 110697.com | 983497.com | www.764118.com | 332396.com | www.mw40.com | www.bg06.cc | www.i79.club | www.by2.com | 076411.com | 411537.com | 791428.com | 930338.com | 331594.com | 170456.cc | www.927658.com | www.768088.com | www.7714.vip | www.002317.com | www.096921.com | www.297756.com | www.373733.com | www.617955.com | 027956.com | 879944.com | www.wx03.cc | www.m66.xyz | www.4472.me | www.017973.com | www.137208.com | www.418855.com | www.558996.com | www.658422.com | www.841217.com | 977894.com | 871160.com | www.94417.com | www.65899.com | www.269489.com | www.318816.com | www.343605.com | www.311803.com | www.137662.com | www.196173.com | www.017515.com | www.566957.com | www.566441.com | www.6444.in | www.90865.com | www.065065.cc | www.162232.com | www.400168.cc | www.819078.com | www.885807.com | 905719.com | www.ju89.com | www.351946.com | www.427543.com | www.541642.com | www.577009.com | www.594679.com | www.572793.com | www.cai9077.com | www.mh97.com | www.64pj.cc | www.146983.com | www.487979.com | www.513877.com | www.521611.com | www.603203.com | www.679510.com | www.769926.com | www.879139.com | 262491.com | www.1523.cn | www.07937.com | www.058998.com | www.122063.com | www.322433.com | www.323508.com | www.286718.com | www.505163.com | www.928616.com | 932555.com | 971232.com | 903703.com | www.981940.com | 345017.com | www.104665.com | 162795.com | www.092073.com | www.197965.com | www.295105.com | www.687358.com | www.717586.com | www.751703.com | www.977465.com | 641488.com | 183838.com | www.yt6.com | www.49299.cc | www.90855.com | 527833.cc | www.57.cn | www.is50.com | www.89mr.com | www.a49.xyz | www.cp3392.com | 3G彩票www.c138.vip | 605331.com | www.28yg.com | www.51628.cc | www.127034.com | 397342.com | www.dm76.com | www.td43.com | www.52hf.com | www.382305.com | 284888.com | 874822.com | 307710.com | www.717607.com | www.iw52.com | www.3523.org | www.302981.com | www.622109.com | www.924699.com | 144464.com | 586021.com | 810389.com | www.295999.com | www.952981.com | www.733026.com | www.553665.com | www.371692.com | www.776143.com | 7036.biz | www.986049.com | www.10mb.com | www.680.tv | www.9440.cn | www.103797.com | www.160046.com | www.517233.com | www.432.biz | www.33778.cc | www.55125.cc | www.047739.com | www.8189.pw | www.161668.com | www.947792.com | www.962062.com | www.861.in | www.023770.com | www.109638.com | www.17469.com | www.47804.com | www.384468.com | www.623206.com | 520040.com | 040033.com | 796484.com | www.90vs.info | www.a38.com | www.86ku.com | www.8203.site | www.212067.com | www.506621.com | www.877777.cc | 320254.com | www.456154.com | www.809.in | www.3918.cc | www.3927.love | www.9487.loan | www.7029.org | www.92061.com | www.319020.com | www.563052.com | 426686.com | www.pj76666.com | 648789.com | www.cp6771.com | www.915035.com | www.686873.com | 578251.com | www.vh7.com | www.464606.com | 186111.com | 516499.com | 968747.com | www.411779.com | www.531097.com | www.379792.com | www.799146.com | www.175615.com | www.042266.com | www.338657.com | www.853654.com | 305362.com | 701304.com | www.sl15.com | www.o98.cn | www.18vt.com | www.359002.com | www.617319.com | www.843998.com | 270806.com | www.1517.org | www.790415.com | www.900076.com | www.897232.com | www.905635.com | www.031955.com | www.080849.com | www.886710.com | www.005697.com | 456964.com | 827459.com | 270703.com | 453284.com | www.qo72.com | www.93dv.com | www.423253.com | www.234200.cc | www.391271.com | www.691832.com | www.682342.com | www.469178.com | www.405076.com | www.637018.com | www.803526.com | www.840028.com | www.61rc.com | www.48ot.com | www.54ko.com | www.43gb.com | www.19oa.com | www.x50.online | www.48ru.com | www.92oc.com | www.4279.top | www.7794.net | www.413378.com | www.pn50.com | www.51ym.com | www.1377.com | www.136633.com | www.566699.com | www.653137.com | www.07637.com | www.39581.cc | www.4692.top | www.20gw.com | www.28.me | www.42um.com | www.839982.com | www.062891.com | 840504.com | 911530.com | www.yp9.cc | www.82864.com | www.084321.com | www.082091.com | www.522290.com | www.677974.com | www.0590.vip | www.3827.in | www.my15.com | www.1888.website | www.17831.cc | www.352895.com | www.xk08.com | www.12em.com | www.03007.com | www.7733.top | www.025360.com | www.185761.com | www.552357.com | 667382.com | 777209.com | 566308.com | 899569.com | www.uu57.com | www.06363.cc | www.44756.com | www.001803.com | www.089993.com | www.325631.com | www.cm52.com | www.gr90.com | www.sz78.com | www.934011.com | www.0974.date | www.34294.com | www.8088.pw | www.3114.org | www.760147.com | www.737711.com | www.jb98.com | www.ur35.com | www.aj01.com | www.1815.tv | www.128248.com | www.210356.com | www.69242.com | www.097529.com | 399878.com | 116144.com | ss86.com | 472234.com | 天下彩www.481770.com | 301163.com | 057882.com | cp0354.com | www.8231.loan | www.3141.com | www.7575.in | www.099167.com | 954241.com | 352843.com | www.348245.com | www.550317.com | www.er25.com | www.j47.cc | www.57115.cc | www.392779.com | www.8198.net | www.952875.com | www.100072.com | www.097792.com | www.175370.com | www.528460.com | www.971017.com | www.cai0900.com | www.wg2.cc | www.61136.cc | www.40537.com | www.252765.com | www.246772.com | www.970504.com | www.23122.cc | www.39287.com | 103600.com | 876538.com | 963671.com | 世彩堂www.5854u.cc | 889125.com | www.337058.com | www.352311.com | www.6724.cc | www.706623.com | www.724209.com | 438146.com | www.783032.com | www.979059.com | www.678123.com | www.680639.com | www.739284.com | www.699774.com | www.926949.com | www.876378.com | www.703269.com | www.03eo.com | www.0536.org | www.270111.cc | 855208.com | www.397930.com | www.327.com | www.265744.com | www.409426.com | www.766387.com | www.7508.top | www.721091.com | www.706009.com | gv35.com | 211777.com | 103200.com | www.68951.cc | 274002.com | 246313.com | 749128.com | www.mu53.cc | www.tg93.com | www.yr41.com | www.tm23.com | www.363585.com | 883214.com | www.262250.com | www.55358.com | www.400512.com | www.579495.com | 440923.com | 176188.com | www.hv80.com | www.87eq.com | www.226501.com | www.591768.com | 329336.com | 乐博彩票www.377034.com | www.ry45.com | www.924963.com | 894067.com | www.50321.cc | www.650117.com | 051309.com | 博友彩www.996745.com | 非凡彩票www.77210g.com | www.746.bid | www.6582.xyz | www.1931.top | www.zh45.com | 购彩堂www.576734.com | 乐彩赢www.0014x.com | 361106.com | 211296.com | www.981446.com | 389987.com | www.ys64.com | www.1080.pro | www.32881.cc | www.004369.com | www.578592.com | www.618698.com | www.770067.com | www.49hp.com | www.02zj.com | www.wq08.com | www.67.link | www.e97.club | www.6312.xyz | www.759.in | www.181673.com | www.657701.com | www.662075.com | 277293.com | 49xg.com | 107793.com | 271905.com | www.43iq.com | www.a10.vip | www.09ug.com | www.36in.com | www.59299.cc | www.133132.com | www.719775.com | www.cai8128.com | www.50fq.com | www.19583.cc | www.2521.wang | www.53xz.cc | www.38dt.com | www.f49.loan | www.xp08.com | www.987994.com | www.950067.com | www.871330.com | 812550.com | 311276.com | 476416.com | 572060.com | 387234.com | 390255.com | 华夏彩票www.hx3355.com | www.2457.com | www.9593.biz | www.3912.org | www.711.me | www.007252.com | www.129071.com | www.667675.com | www.657373.com | 885559.com | www.964094.com | www.876623.cc | www.831367.com | www.890233.com | www.504534.com | www.039595.com | 575289.com | 480666.com | 671821.com | 670713.com | 729877.com | 889570.com | 658312.com | 057332.com | 45wn.com | 337579.com | 网易彩票www.36788k.com | 904389.com | www.903158.com | www.791645.com | www.421715.com | www.oe44.com | www.h08.com | www.71sn.com | www.f16.top | www.zn25.com | www.67qa.com | www.185848.com | www.694574.com | 081361.com | www.600977.com | www.518839.com | www.586137.com | www.699004.com | www.658889.com | www.914752.com | 百姓彩票www.www.bxcp3333.com | 578469.com | 969242.com | 501281.com | www.844855.com | www.947658.com | www.701414.com | www.593181.com | www.550078.com | www.383231.com | www.592585.com | www.388273.com | 378759.com | E彩堂www.43818z.com | 953230.com | www.305745.com | www.967026.com | www.198376.com | www.271644.com | www.35dh.com | www.xv03.com | 500彩票www.652592.com | 424092.com | www.ao33.com | 104012.com | 739643.com | 916644.com | 753842.com | www.133.website | www.56zg.com | www.117228.com | www.66906.com | www.th32.com | www.815759.com | 8841.biz | 790697.com | 924972.com | www.8236.xyz | www.55252.com | www.445828.com | 533762.com | 81088.cc | 221830.com | www.pw20.com | www.0741.org | www.774321.com | www.676745.com | www.668298.com | www.762111.cc | www.739451.com | 492448.com | www.890524.com | 378405.com | www.6868.cx | www.003616.com | www.57752.cc | www.297950.com | www.279870.com | www.874397.com | www.771268.com | www.596700.com | www.557514.com | www.610679.com | 672590.com | 853336.com | www.025639.com | www.43654.com | www.71aa.com | www.io23.com | www.zz44.com | www.66342.com | www.21918.com | www.978863.com | www.790803.com | www.457335.com | www.231292.com | www.188277.com | www.172353.com | www.325999.com | www.227126.com | www.108203.com | www.500945.com | www.272282.com | www.7119.biz | www.279217.com | 126190.com | 乐购彩www.lg36.com | 277849.com | www.22jn.com | www.900631.com | www.723958.com | www.591744.com | www.499224.com | www.745248.com | 883964.com | www.jd66.com | www.ez32.com | 豪彩VIPwww.856659.com | 名门彩www.33997u.com | JJ彩票www.24020.cc | www.cp8992.com | 913732.com | 470090.com | 118彩票www.62118c.com | www.47nz.com | www.935253.com | 金冠彩票www.49956b.com | vj07.com | 896516.com | 563885.com | 500彩票www.52072t.com | www.2489.vip | www.10pt.com | www.io19.com | www.lq73.com | www.ip39.com | 大赢家彩票www.517411.com | www.577029.com | www.479705.com | www.518196.com | www.464706.com | www.358086.com | www.996352.com | www.971470.com | www.941237.com | www.3452.org | www.1859.biz | www.532957.com | www.873366.com | 264897.com | 397259.com | 589941.com | 492403.com | 310211.com | 827519.com | 亿发彩票www.530833.com | 461163.com | 836979.com | 中彩网www.61233u.com | 盛大彩票www.c6712.com | 796545.com | www.985351.com | www.sa84.com | 654695.com | 261957.com | www.800090.cc | www.622777.com | 60896.com | 961033.com | 946693.com | www.89ps.com | www.262709.com | www.43342.com | 848504.com | www.181545.com | www.028439.com | www.78229.com | www.986249.com | www.863268.com | www.771619.com | www.839960.com | www.754632.com | www.588067.com | www.498325.com | 58349.com | 爱米彩www.am8080.com | 051357.com | 323491.com | 485501.com | www.728.website | www.789.red | www.41198.com | www.5289.pw | www.851231.com | www.726708.com | www.519252.com | www.144512.com | www.375383.com | www.556976.com | www.870941.com | www.sk43.com | www.iw1.cc | 328096.com | www.879740.com | www.558208.com | www.003678.com | 776007.com | www.vi03.com | 793716.com | 832198.com | www.05dc.com | www.ln72.com | www.59935.com | www.137516.com | www.526068.com | www.89qy.com | www.32568.com | www.86ez.com | www.595503.com | www.933766.com | www.65ll.com | www.168872.com | www.060301.com | www.6480.vip | www.42dc.com | www.q62.club | 441130.com | 964196.com | www.i36.club | www.288681.com | www.958470.com | www.dp37.com | www.44kl.com | www.468455.com | 579477.com | www.929889.com | 540729.com | 861096.com | www.191972.com | www.675281.com | www.311792.com | www.574874.com | 095996.com | 029864.com | www.966725.com | www.10321.cc | www.278127.com | www.228772.com | www.129179.com | www.425720.com | www.324379.com | www.245996.com | www.218728.com | www.75362.cc | www.700463.com | www.563296.com | www.500506.com | www.723520.com | www.788529.com | 157640.com | 234809.com | 369588.cc | www.975384.com | www.766852.com | www.77854.com | www.03809.com | www.89va.com | www.4nw.cc | www.65904.com | www.21001.com | www.17.link | www.i62.cn | www.7874.cm | www.437619.com | www.631221.com | www.27253.com | www.6046.com | www.ru59.com | www.pi56.com | www.697298.com | 004130.com | 028775.com | www.wx0.com | 大赢家彩票平台www.250209.com | 567198.com | www.88hx.com | www.pv87.com | www.4535.vip | www.592908.com | www.318649.com | www.525113.com | www.607813.com | www.384996.com | www.728472.com | www.346320.com | www.230084.com | www.036591.com | 乐迎彩票www.tang444.com | 306456.com | 804555.com | www.982478.com | www.mk38.com | www.eo98.com | www.ko22.com | www.221164.com | www.127670.com | www.070351.com | www.830375.com | www.758001.com | www.589010.com | www.156410.com | www.005511.com | www.p64.site | 458481.com | 81508.com | www.987316.com | www.717589.com | 681256.com | www.823801.com | www.785590.com | www.0822.org | www.e75.cn | www.da56.com | www.6371.biz | www.jr3.cc | www.zv23.com | www.964121.com | www.901506.com | www.612267.com | www.896353.com | www.fi31.com | 彩民网www.caim2.com | 971042.com | 9239.biz | 575700.com | www.266091.com | 772450.com | www.43nm.com | www.pg83.com | www.438222.cc | www.454532.com | www.958666.cc | www.4379.com | www.311149.com | www.859567.com | www.9969.in | www.32ib.com | www.av51.com | 763848.com | www.00551.cc | www.2581.wang | www.757715.com | www.599.cn | www.df30.com | www.cx14.com | www.184611.com | www.514515.com | 13281.com | 72749.com | www.kv03.com | www.143569.com | www.322005.com | www.390361.com | www.338945.com | www.64033.com | www.799526.com | www.405559.com | www.527575.com | www.310591.com | www.144767.com | www.773913.com | 015558.com | www.773107.com | www.t78.shop | www.87775.com | www.0066.com | www.567448.com | www.129591.com | www.657031.com | www.771915.com | 购彩在线www.66332t.com | 948050.com | 100882.com | www.874901.com | hc65.com | 068689.com | 972164.com | www.54848.com | www.956107.com | www.654691.com | www.273546.com | www.116079.com | www.79671.com | www.1532.cc | www.cp2966.com | 易彩网www.36166v.com | 982584.com | www.762003.com | www.08rd.com | www.cp851.com | www.384833.com | www.698641.com | www.763187.com | www.508826.com | 大赢家彩票平台www.937065.com | 113482.com | www.973521.com | www.755523.com | www.518211.com | www.253835.com | www.026397.com | www.586670.com | www.093699.com | www.05070.com | www.27uk.com | www.642488.com | 购彩在线www.66332w.com | www.012211.com | www.87966.com | www.021840.com | www.1444.vip | www.61021.com | www.59023.com | www.23559.com | www.t556.com | www.869736.com | kj57.cc | 260048.com | www.901167.com | www.968935.com | www.971823.com | www.700083.cc | 6962.biz | www.127159.com | www.209860.com | www.85954.com | www.263137.com | 924924.com | www.671560.com | www.979361.com | www.678390.com | www.398192.com | www.me9.com | www.632370.com | 747505.com | 954857.com | 243216.com | 957665.com | 606862.com | www.817376.com | 525142.com | www.010295.com | www.51144.cc | www.148700.com | www.412320.com | www.202613.com | www.979517.com | www.612527.com | www.858453.com | www.996897.com | www.702328.com | www.679816.com | www.275671.com | www.462178.com | www.125128.com | www.276662.com | www.079685.com | www.6225.cc | www.xg77.com | www.nd88.cc | www.791533.com | www.505393.com | www.165884.com | 587079.com | 978431.com | 175253.com | cai6606.com | www.972414.com | www.010.bid | www.3622.in | 749338.com | 41xj.com | www.210088.com | www.1952.live | 050406.com | www.667955.com | 757502.com | www.795853.com | www.519478.com | www.365854.cc | www.137918.com | 775174.com | manbetx.cc | 119649.com | www.979388.com | www.752322.com | www.400122.com | www.115617.com | www.811097.com | 080678.com | 22117.com | 1949.cc | 8187.org | www.78611.cc | www.65998.com | www.407012.com | www.594434.com | www.885858.com | www.829188.com | 619784.com | www.58159.cc | www.88178.cc | www.47748.com | www.8632.xyz | www.qp36.cc | 168024.com | www.6027.biz | 981417.com | www.925960.com | 034985.com | www.897648.com | 128301.com | 中国福利彩票www.34788n.com | 259782.com | www.022021.com | www.049463.com | www.084.space | www.495404.com | www.320417.com | www.778620.com | www.471883.com | www.200972.com | 351020.com | 047922.com | www.lq80.com | 大彩网www.190302.com | 772473.com | www.795417.com | 109145.com | www.989281.com | www.697662.com | www.94ph.com | www.wc66.com | 287356.com | 088326.com | www.263785.com | www.212300.com | www.533533.com | www.746126.com | www.574822.com | www.113694.com | www.200083.com | www.818899.com | www.855951.com | www.1053.cn | www.76nh.com | www.zw65.com | 135599.com | 964465.com | www.590303.com | www.382301.com | www.730153.com | www.256369.com | www.047518.com | 435883.com | 585195.com | www.661340.com | www.570130.com | www.033905.com | www.077297.com | www.eh04.com | www.486779.com | www.097856.com | www.11767.cc | www.386207.com | www.537885.com | www.071165.com | www.901355.com | www.713311.com | www.326296.com | www.5755.top | www.8gc.cc | 977143.com | www.804066.com | 快彩在线www.2632t.com | www.458456.com | 365803.cc | 3823.biz | www.662387.com | www.604333.cc | www.831000.com | 525820.com | 940030.com | www.191284.com | www.088139.com | www.696948.com | www.516771.com | www.322751.com | www.097581.com | www.16613.cc | www.0413.net | www.561696.com | www.632586.com | www.505841.com | 240885.com | www.986309.com | www.871445.com | www.912243.com | www.89br.com | www.ml34.com | www.9258.org | 28360.com | www.572366.com | www.2896.xyz | www.86739.cc | www.89ij.com | www.el16.com | 062448.com | www.630522.com | www.686678.com | www.262643.com | www.102733.com | www.24499.com | www.751445.com | www.190399.com | www.362231.com | www.878877.com | www.55ot.com | 707951.com | 006490.com | www.777488.com | www.337833.com | www.070170.com | www.57115.cc | www.29897.com | www.186178.com | www.445044.com | 908250.com | www.72pj.com | www.74gv.com | www.226801.com | 830147.com | www.083057.com | www.2200.org | www.398020.com | www.46434.com | www.35uf.com | www.905262.com | 933327.com--6365668.com | 4379.biz | 365742.cc | www.975534.com | www.055702.com | www.r00.in | www.28482.com | www.037110.com | www.22774.com | www.dp41.com | www.04qa.com | www.pf53.com | 2488.pw | 082583.com | 266305.com | www.972280.com | www.617565.com | 20355.com | www.834410.com | www.dn68.cc | www.978061.com | www.967138.cc | www.520581.com | www.6033.org | www.09791.com | www.796621.com | www.979861.com | 329692.com | 022161.com | www.02vu.com | www.215651.com | www.621036.com | www.cp327.com | www.781792.com | 653025.com | www.222292.com | www.5559.vip | www.yd25.com | www.fh45.com | 939425.com | www.977116.com | www.02mk.com | www.rj.cc | www.972064.com | www.380271.com | 324193.com | 1776.wang | www.057546.com | 497258.com | www.60607.com | www.091047.com | www.8361.pw | www.151572.com | www.444540.com | www.60345.com | www.87283.com | www.130018.com | www.r18.pink | www.jm09.com | www.ib57.com | 612584.com | www.32979.com | 华人彩票www.040435.com | www.698948.com | www.967118.com | www.603581.com | www.933019.com | 398961.com--918.com | www.953846.com | www.880032.com | www.989017.com | www.578615.com | www.276283.com | www.730663.com | www.497167.com | www.098507.com | www.648677.com | www.207454.com | www.40989.com | www.104.live | www.l76.com | 745699.com | www.920888.com | 288547.com | www.61lt.com | 74999.com | www.11js.cc | www.973332.com | www.427255.com | www.289314.com | www.6438.cm | 双彩网www.639012.com | 783962.com | 324625.com | www.zr2.com | www.1wj.com | www.43042.com | 642336.com | www.944095.com | 万历彩票www.77114j.com | www.955987.com | www.174669.com | www.030072.com | www.20dx.com | www.lr54.com | www.hv96.com | 288470.com | www.0132.cm | 237469.com | www.cp9766.com | www.23524.cc | www.662337.com | www.607757.com | www.f96.org | www.m63.cn | 749993.com | www.33274.com | www.0817.biz | www.057551.com | www.572433.com | www.291863.cc | www.365044.cc | www.339416.com | www.021374.com | www.17720.cc | www.mb93.com | www.cp340.com | www.978640.com | 626076.com | www.882945.com | www.134218.com | www.145173.com | www.4136.cm | 324687.com | www.wh7.com | www.390908.com | www.54nz.com | www.022223.com | www.672333.com | www.769229.com | www.209956.com | 635214.com | www.970303.com | www.779003.com | www.864797.com | www.26qn.com | www.3537.org | www.077997.com | www.551181.com | www.323643.com | www.099838.com | www.691069.com | www.163087.com | 319704.com | www.52po.com | www.358628.com | www.069166.com | www.9396.org | 426367.com | 100650.com | www.714715.com | 962244.com | www.885333.com | www.954641.com | www.512373.com | www.607967.com | 645386.com | www.753537.com | 181657.com | www.863606.com | 500彩票www.347177.com | www.89890.com | www.326144.com | www.539320.com | www.089812.com | www.36161.cc | www.385302.com | www.862399.cc | 688彩票www.688dl.com | www.929349.com | www.237416.com | www.22736.com | 961349.com | www.47ds.com | www.235133.com | 868612.cc | www.26822.cc | www.822105.com | www.xpj174.com | 147226.com | www.901147.com | www.942791.com | www.003256.com | 584343.com | www.008132.com | 909848.com | www.918330.com | www.539483.com | 049194.com | www.829278.com | www.om01.com | 975046.com | www.062920.com | www.086081.com | 788389.com | www.017595.com | www.0755.link | www.036267.com | www.038098.cc | www.8916.vip | www.du69.com | 984017.com | 568036.com | www.237522.com | www.4399.pw | www.96es.com | www.595288.com | www.341185.com | www.650739.com | www.13400.com | www.211518.com | www.7341.cc | www.cx00.com | www.895096.com | www.767390.com | www.fu63.com | 595717.com | www.923057.com | www.405827.com | www.947391.com | www.557905.com | www.311739.com | www.vj26.com | www.354174.com | 088943.com | 964001.com | www.221352.com | 984841.com | www.876452.com | www.403633.com | www.833112.com | www.059848.com | www.bh52.com | www.834299.com | 397410.com | 0933.loan | www.464440.com | www.430556.com | www.126460.com | www.9wl.cc | www.048.cn | www.880.org | 亿发彩票www.901376.com | www.964114.com | www.fg29.com | www.k60.net | 972034.com | www.787816.com | www.509532.com | www.004370.com | www.936023.com | 99福彩www.716997.com | 412668.com | www.225594.com | www.02330.com | www.oh73.com | www.wl27.cc | 941060.com | www.813.mobi | www.493465.com | www.000787.com | www.py07.com | www.890759.com | www.610351.com | www.471618.com | www.70px.com | www.6661.cn | www.408046.com | www.259132.com | www.341998.com | www.595826.com | www.904110.com | www.543206.com | www.847206.com | www.960666.com | www.713995.com | www.331194.com | www.739641.com | www.959349.com | www.095646.com | www.9832.cm | 731021.com | 大赢家彩票网www.219055.com | 419.cn | www.965031.com | www.566601.com | www.17142.com | www.775785.com | www.353701.com | www.15028.com | www.7948.cc | www.50tu.com | 962046.com | www.973595.com | www.6638.biz | www.281755.com | www.839021.com | www.888756.com | www.697635.com | www.315104.com | ty19.com | 749533.com | www.900422.com | 172080.com | www.629500.com | www.321767.com | www.953445.com | www.803598.com | www.836999.com | www.904831.com | www.538133.com | www.499628.com | www.063332.com | www.o33.com | 226183.com | www.678611.com | www.036110.com | www.776560.com | 615646.com | www.026053.com | www.7549.top | www.p23.cc | www.20ga.com | 梦想彩票www.33112q.com | 659086.com | www.654338.com | www.523527.com | www.026367.com | www.34hz.com | 500彩票网www.743966.com | 621007.com | 845857.com | www.562455.com | 842248.com | www.923186.com | www.33243.com | 500彩票www.50074j.com | 421199.com | 788127.com | www.zv47.com | 70377.com | www.595827.com | www.362671.com | www.39115.cc | www.714900.com | www.620086.com | www.294844.com | www.09923.com | www.cp6133.com | www.874294.com | www.891545.com | www.444235.com | www.285220.com | www.83110.com | www.wu50.com | 359752.com | www.839922.com | 083948.com | www.715383.com | www.219606.com | 872008.com | 350929.com | www.910932.com | www.301615.com | www.911033.com | 029844.com | 755289.com | www.752060.com | www.919229.com | www.692577.com | 5t.com | www.764868.com | www.288408.com | www.701196.com | www.376595.com | www.413965.com | www.72192.cc | www.48cj.com | www.123031.com | www.292591.com | www.974269.com | www.489609.com | www.691610.cc | www.775557.com | www.612080.com | www.236539.com | www.5060.cm | www.40939.com | www.050550.com | www.984871.com | www.761901.com | www.gq96.com | 160770.com | www.765208.com | 023554.com | www.635343.com | www.635926.com | www.583167.com | www.28522.com | www.194520.com | www.375723.com | www.209938.com | 027336.com | www.889162.com | www.345644.com | www.111601.com | www.583768.com | www.392653.com | 324768.com | www.398422.com | www.550783.com | www.326319.com | www.401070.com | www.180421.com | www.172937.com | www.63ja.com | 503152.com | 054821.com | www.771753.com | www.952320.com | www.493721.com | 818724.com | www.546051.com | www.758655.com | www.373981.com | www.899226.com | www.995244.com | www.637101.com | www.215611.com | www.393646.com | 云博彩票www.05883.cc | www.400790.com | www.322232.com | www.47vw.com | www.106074.com | www.586509.com | www.119978.com | 亿彩www.6832k.com | www.833097.com | www.811056.com | www.753656.com | www.342911.com | www.187559.com | www.61069.com | www.8189.cn | www.8325.cn | www.981108.com | www.499895.com | www.677926.com | www.6176.cm | www.da71.com | 天际彩票www.az0908.com | www.880112.com | www.173932.com | www.89609.com | www.6153.top | 492398.com | www.900877.com | www.352859.com | 688tm.com | www.658586.com | 639540.com | www.739811.com | www.165440.com | www.029977.com | www.235709.com | www.20vr.com | 77083.com | www.530898.com | www.637359.com | www.448398.com | www.997799.com | www.378344.com | www.126492.com | www.95713.com | 大赢家彩票平台www.225065.com | www.584842.com | www.637082.com | www.678205.com | www.jx06.com | 705299.com | 000134.com | 500万彩票www.96386q.com | 855828.com | www.775520.com | www.456338.com | www.889195.com | www.695603.com | www.ss86.com | www.539826.com | www.764062.com | www.882628.com | www.543459.com | www.825.me | www.761535.com | www.q05.cn | www.439903.com | www.141838.com | www.666796.com | www.121770.com | www.o86.com | ud43.com | 658679.com | www.826327.com | www.894688.com | www.444288.com | www.76598.cc | www.704507.com | 3982.biz | www.536407.com | www.637559.com | www.586720.com | www.168880.cc | www.339161.com | www.8952.cn | www.813663.com | www.mm.cc | www.961884.com | 059778.com | www.726465.com | www.202516.com | www.56960.com | www.39679.com | www.258887.com | www.17913.com | bm49.com | 942507.com | www.631342.com | www.og75.com | 752776.com | www.636318.com | www.794643.cc | www.cp234.com | www.870444.com | www.jr13.com | www.79qq.com | www.17iy.com | 507778.com | www.k54.com | www.325816.com | www.212422.com | www.71560.com | 332951.com | www.fh96.com | 089024.com | www.9781.biz | 582850.com | www.38911.cc | www.3095.biz | www.ch2.com | www.793367.com | www.414342.com | www.36zb.com | 288027.com | www.379896.com | www.70965.com | www.42dc.com | www.ew29.com | 爱彩www.235671.com | www.884212.com | www.552529.com | www.5137.biz | www.541777.com | www.60035.cc | www.09rg.com | www.942929.com | 003339.com | www.830037.com | www.022731.com | 大赢家彩票平台www.186297.com | 619016.com | www.605699.com | www.150192.com | www.236105.com | www.ff83.com | www.856940.com | 948966.com | www.654341.com | www.974270.com | www.215915.com | www.970646.com | www.323465.com | www.506070.com | www.055365.com | www.489755.com | www.691871.com | www.970883.com | www.273411.com | www.u33.com | www.912283.com | www.845672.com | www.381711.com | www.188181.cc | 5003.com | www.41108.com | 华彩www.71399b.com | www.0588.wang | www.43gp.com | www.0758.xyz | 964276.com | www.618471.com | 628675.com | www.455235.com | www.776165.com | www.375003.com | www.506359.com | www.691666.com | 211038.com | 479305.com | www.760134.com | www.766650.com | 739103.com | www.735057.com | www.027152.com | 636824.com | www.754516.com | www.615826.com | www.630803.com | www.271391.com | www.660261.com | www.849536.com | www.620030.com | www.57og.com | www.124884.com | www.793848.com | www.087082.com | www.31683.cc | 249282.com | 84388.com | www.632038.com | www.110142.com | 大赢家彩票平台www.729133.com | www.85wj.com | 507507.cc | 963931.com | 盈彩www.yc7701.com | 314565.com | www.023502.com | www.315352.com | www.849025.com | www.536216.com | www.184989.com | www.68fg.com | 162770.com | 365776.cc | www.858741.com | www.883450.com | www.667792.com | www.090013.com | www.53614.com | www.33775.cc | 594964.com | www.478949.com | www.0665.vip | 大赢家彩票平台www.287916.com | 947297.com | 981101.com | www.875046.com | www.789089.com | www.309707.com | www.333024.com | www.70xk.com | 亿万彩票www.456826.com | www.040788.com | www.988224.com | www.468885.com | www.e45.biz | www.984039.com | www.221678.com | www.445532.com | www.27904.com | www.gr84.com | www.945206.com | www.226842.com | www.wn52.com | www.977887.com | www.09980.cc | www.677311.com | www.320563.com | www.29123.com | www.89280.com | 好彩在线www.hczx4.com | www.8313.cm | www.056130.com | 中彩网www.61233hh.com | 709249.com | www.537550.com | www.912549.com | 彩71www.530629.com | www.874126.com | www.654526.com | www.927038.com | 凤凰VIwww.fh17.com | www.829353.com | 773570.com | www.681794.com | www.060737.com | www.nx0.com | www.126216.com | www.169867.com | www.115603.com | 974689.com | www.369385.com | www.147542.com | www.167835.com | www.242.in | www.13257.cc | www.78ho.com | 199678.com | 460446.com | www.092829.com | www.54547.cc | www.2479.top | www.96as.com | 964823.com | www.863090.com | www.736753.com | www.095193.com | www.gm88.cc | www.926037.com | www.937855.com | www.245996.com | www.639762.com | www.176410.com | www.0323.org | www.5642.xyz | www.034010.com | www.gy12.com | 029070.com | 117536.com | www.800209.com | www.111576.com | www.t69.xyz | www.6449.vip | www.142502.com | www.255609.com | www.65yt.com | 582040.com | 439650.com | www.603353.com | www.019476.com | www.308592.com | www.482630.com | www.82254.com | ab96.com | www.591018.com | www.79723.com | www.78006.com | www.13qr.com | 949036.com | 495656.com | www.265188.com | www.341171.com | www.172810.com | www.800579.com | www.476333.com | 004232.com | 361710.com | www.688052.com | www.799533.com | www.801071.com | www.926567.com | www.287973.com | www.990905.com | www.962750.com |