English
聯系我們
網站地圖
郵箱
舊版回顧



【科技日報】銀河系首次觀測到重元素組成恒星

文章來源:科技日報 陳超   發布時間:2019-05-10  【字號:     】  

  中國國家天文臺、日本國立天文臺組成的聯合研究小組,在銀河系中發現了一顆含有較多重元素的特殊恒星“J1124+4535”,顯示出銀河系在誕生和成長過程中曾與小星系合體的痕跡。

  這顆老年恒星是迄今為止首次發現的具有如此多重元素特征的恒星,而相似的恒星在圍繞銀河系附近的矮星系中多有發現。研究團隊據此認為,此次發現的恒星是在一個矮星系中誕生的,該矮星系與銀河系碰撞合體后成為銀河系一員。被銀河系合并的矮星系已完全喪失形狀,其原有恒星散落在銀河系中,但恒星的軌道運動及化學構成(元素組成)仍維持合并之前的狀態。此次觀測結果證明,像銀河系這樣的較大星系是經過多次與小星系的撞擊、合體,逐漸成長為目前這樣的星系的。

  人類居住的銀河系是螺旋狀的圓盤結構、恒星稀疏存在的“暈輪結構”。大多數恒星誕生于銀河系形成過程的初期,有些是由氣體在銀河系中集聚誕生;有些是在矮星系中誕生,之后被銀河系吸收過來。這一過程已被計算機模擬預測。

  自2014年開始,中日聯合研究小組利用中國的郭守敬望遠鏡(LAMOST,大天區面積多目標光纖光譜天文望遠鏡)甄選出金屬元素含量較少的恒星,日本昴望遠鏡利用搭載的高色散光譜儀(HDS)對選擇的恒星進行詳細觀測。截至目前,已對400多個天體進行了詳細的元素組成測定。此次,他們發現“J1124+4535”天體具有突出特征,即該恒星鎂、鐵比重較低,重于鐵的重元素相對較多。這是在銀河系首次觀測到的由極端元素組成的恒星。而與其相似的恒星在銀河系周圍的矮星系中已發現數例,明確顯示該恒星誕生于矮星系,之后被銀河系吸收。

  研究成果近期發表在《自然·天文學》網絡版。

  (原載于《科技日報》 2019-05-10 02版)




(責任編輯:侯茜)

附件:

專題推薦


© 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

GO彩www.cha62.com 080019.com | 756162.com | 087694.com | 614478.com | 960714.com | 81br.com | www.988817.com | cp052.com | 689109.com | www.jw37.com | www.823033.com | www.21jt.com | 02br.com | www.194771.com | 小米彩票www.193006.com | www.634338.com | www.583264.com | www.131788.com | www.089506.com | www.97393.cc | www.wd69.com | 544477.com | 666732.com | www.0837.xyz | www.59938.com | www.267701.com | www.388630.com | www.695010.com | www.778661.com | www.899900.com | www.946588.com | www.967523.com | TT彩票www.515663.com | www.wx92.com | www.81oj.com | www.43iz.com | www.6028.cm | www.49554.com | www.233401.com | www.382359.com | www.764877.com | www.894877.com | www.ch8.cc | www.6976.biz | www.82791.com | www.234280.com | www.559652.com | www.873491.com | 311506.com | 308006.cc | www.yf23.com | www.9001.biz | www.019074.com | www.162552.com | www.662716.com | 0886.date | 949110.com | www.cq23.com | www.028091.com | www.253663.com | www.471762.com | www.825760.com | 670792.com | www.qj15.com | www.85vs.com | www.7753.loan | www.86056.com | www.116097.com | www.247899.com | www.327669.com | www.413291.com | www.956353.com | 756969.com | 197077.com | 195993.com | www.ak37.com | www.c58.cm | www.47gy.com | www.1429.in | www.52351.cc | www.105896.com | www.255739.com | www.367379.com | www.590398.com | www.756679.com | 578790.com | 937251.com | 彩天下www.196807.com | www.cai8338.com | www.vh21.com | www.78bq.com | www.83822.com | www.066556.com | www.173545.com | 919451.com | www.516646.com | www.57861.cc | www.466616.com | www.8840.vip | 501762.com | www.574117.com | www.53513.cc | www.xh47.cc | www.974795.com | www.74hz.com | www.6006.top | www.5757.la | www.34905.com | www.122776.com | www.340267.com | www.403930.com | www.587418.com | www.731510.com | www.797226.com | www.885389.com | www.987545.com | www.499306.com | 490317.com | 946880.com | 723075.com | 吉利彩票www.80065z.com | www.gw30.com | www.42ag.com | www.401.cn | www.63330.cc | www.147499.com | www.531563.com | www.678569.com | www.600936.com | www.697667.com | www.762733.com | www.830739.com | www.879963.com | www.ui5.cc | www.es70.com | www.13hh.com | www.44oi.com | www.98ac.com | www.77829.com | 507903.com | www.2031.link | www.96783.com | www.071177.com | www.151363.com | www.318204.com | www.380065.com | www.677255.com | www.750398.com | www.799146.com | dl92.com | cai1115.com | 188764.com | www.79dm.com | www.1677.in | www.63010.com | www.088570.com | www.137754.com | www.359812.com | www.584062.com | www.635114.com | www.774360.com | www.787557.com | 608381.com | 001792.com | www.1358.tv | www.075809.com | www.067981.com | www.100772.com | www.111915.com | www.182253.com | www.338190.com | www.359296.com | www.616069.com | www.791854.com | 361669.com | 697066.com | www.cc5.com | www.ib71.com | www.01lc.com | www.26vj.com | www.32652.cc | www.60263.com | www.077157.com | www.125567.com | www.115993.com | www.151789.com | www.417714.com | www.508835.com | www.522860.com | www.553567.com | www.552411.com | www.701692.com | www.790564.com | 彩世界www.99788p.com | www.bh54.com | www.36sp.cc | www.838.biz | www.012021.com | www.098863.com | www.150953.com | www.401355.com | www.646178.com | 268101.com | www.e79.top | www.43104.com | www.252728.com | www.697857.com | www.775793.com | 690922.com | 608681.com | 福利彩票www.78700e.com | www.kq43.com | www.83al.com | www.2926.biz | www.81789.com | www.049047.com | www.161086.com | www.316896.com | www.366916.com | www.696036.com | www.811830.com | www.975434.com | 513589.com | 994875.com | www.cl76.com | www.o13.cn | www.2464.win | www.122081.com | www.210966.com | www.310809.com | www.672371.com | 254926.com | 621053.com | 500彩票www.919725.com | www.pu07.com | www.c75.cn | www.98yf.com | www.6352.biz | www.008646.com | www.114017.com | www.206119.com | www.580655.com | www.712244.com | www.777601.com | www.828055.com | www.731468.com | www.520720.com | www.295482.com | www.922604.com | www.947642.com | www.993416.com | 093135.com | 769774.com | www.275844.com | www.62808.com | www.lk08.com | 479301.com | 947092.com | www.725038.com | www.129385.com | www.34857.com | 380782.com | www.531298.com | www.273794.com | www.3121.win | www.up35.com | 130678.cc | www.p11.live | www.32ug.com | www.74lh.com | www.q57.top | 567243.com | www.795707.com | www.069033.com | 彩票5www.550342.com | 466896.com | www.921779.com | www.636990.com | www.399831.com | www.78460.com | www.74zm.com | 788388.cc | www.355453.com | www.055631.com | www.qq95.cc | 249144.com | 447655.com | www.720277.com | www.561424.com | www.194606.com | 网易彩票www.26163a.com | www.984414.com | www.460580.com | www.211218.com | www.011409.com | www.37985.cc | www.447876.com | www.46276.com | 560379.com | 009515.com | www.mh4.cc | www.yp21.com | www.8bo.cc | www.63vr.com | www.655.xyz | www.060975.com | www.110014.com | www.136297.com | www.373110.com | www.631679.com | www.815680.com | www.875402.com | 545542.com | 069110.com | 678014.com | 23324.com | 500万彩票www.686536.com | www.hw23.com | www.op37.com | www.57rz.com | www.945.hk | www.109446.com | www.040768.com | www.072883.com | www.102698.com | www.188160.com | www.216611.com | www.266309.com | www.309606.com | www.355835.com | www.379188.com | www.622588.com | www.841448.com | 274009.com | 899440.com | 亚洲彩www.68568h.com | 91彩票网www.912485.com | 684029.com | www.cai8099.com | www.9271.online | www.160615.com | www.400983.com | www.652165.com | www.948009.com | www.954360.com | www.952028.com | 884656.com | 314975.com | 127146.com | 337652.cc | 694408.com | 624798.com | 大玩家彩票www.9478b.com | 大赢家彩票平台www.081502.com | 500彩票www.52072c.com | www.dt12.com | www.6yj.com | www.600588.cc | www.644378.com | www.859055.com | www.973177.com | www.975661.com | www.960579.com | www.947950.com | www.941828.com | 28373.cc | 90940.co | 688394.com | 097203.com | 377231.com | www.584.in | www.41276.com | www.70344.com | www.91172.cc | www.001641.com | www.012393.com | www.020814.com | www.082219.com | www.018533.com | www.336230.com | www.286175.com | www.329561.com | www.339850.cc | www.361175.com | www.522427.com | www.548615.com | www.555543.com | www.893844.com | www.885366.com | www.071891.com | 906609.com | www.992515.com | 984800.com | 45983.cc | 900168.com | 081391.com | 954746.com | 514178.com | ql75.com | 442862.com | 974457.com | 375196.com | 958043.com | www.cai8892.com | 网易彩票www.096wy.com | 大奖彩票www.99djcp.com | 688508.com | 彩票驿站www.2350w.com | 大赢家彩票平台www.860705.com | www.sw26.com | www.6376.com | www.9555.date | www.95548.cc | www.88783.cc | www.49597.com | www.005522.cc | www.265313.com | www.280955.com | www.306609.com | www.331776.com | www.888034.com | 188069.com | 949224.com | 355634.com | 167456.com | 686597.com | 127293.com | 513585.com | 145611.com | 024209.com | 669741.com | 乐彩网www.3416p.com | 758486.com | 66487.com | 165602.com | 500彩票www.50054n.com | 大赢家彩票平台www.805681.com | 购彩票www.c5237.com | 天天彩票www.2373v.com | www.gf49.com | www.42ex.com | www.53zz.com | www.16990.cc | www.15493.com | www.337133.com | www.361983.com | www.956863.com | www.902378.com | 612986.com | 653843.com | 024838.com | xj51.cc | 967889.com | www.62397.com | www.103229.com | www.484574.com | www.772363.com | www.840960.com | 426850.com | www.915079.com | www.773692.com | www.650610.com | 778186.com | www.989392.com | www.869003.com | 604884.com | 9265.biz | www.980551.com | www.853985.com | www.764197.com | www.621812.com | 896885.com | 690351.com | 380946.com | www.32668.com | www.6830.vip | www.0591.org | www.1677.bid | www.139.red | www.88483.com | www.55102.com | www.35724.com | www.055309.com | www.79138.com | www.104731.com | www.10638.com | www.5467.vip | www.6zm.com | 体彩世界www.tcsj.com | www.04pi.com | 110780.com--pjc55.com | 73435.com | 3068.biz | 467700.com | www.958625.com | www.887669.cc | www.782058.com | www.732581.com | www.630918.com | www.767972.com | www.590768.com | www.433122.com | www.355883.com | www.542779.com | www.829508.com | www.742899.com | www.662601.com | www.895625.com | 982379.com | 178438.com | 000149.com | www.936261.com | www.772532.com | www.607119.com | www.601411.com | www.501172.com | www.770454.com | www.703818.cc | www.705231.com | www.751144.com | www.650611.com | www.466438.com | www.027754.com | 949398.com | www.964435.com | www.585023.com | www.350218.com | www.7960.org | www.io37.cc | 719015.com | www.964240.com | www.527427.com | www.111065.com | www.13191.com | www.mv69.com | www.675837.com | www.679094.com | www.65733.com | 137124.com | www.815955.com | www.120793.com | www.029539.com | www.1076.wang | 579894.com | 668494.com | www.628827.com | www.975208.com | www.844813.com | www.969229.com | www.774918.com | www.639216.com | www.632467.com | www.623935.com | www.542200.com | www.483615.com | www.283725.com | www.206029.com | www.593963.com | 672023.com | www.977810.com | www.979285.com | www.882896.com | www.906111.cc | www.845661.com | www.928006.com | www.857669.com | www.865279.com | 947795.com | 294191.com | 726581.com | www.947066.com | 979486.com | 315742.com | 298388.com | 132944.com | 022538.com | 818合彩www.07hc.com | 335110.com | www.961826.com | www.949907.com | www.794499.com | www.593408.com | www.380298.com | www.455764.com | www.338013.com | www.268560.com | www.791893.com | www.689273.com | www.488685.com | 985649.com | www.938259.com | 25418.com | www.966537.com | www.859268.com | www.805007.com | www.821738.com | 781041.com | www.48447.com | www.886685.com | www.812655.com | www.815821.com | www.668928.com | www.736711.com | www.978970.com | www.861918.com | www.806480.com | www.897472.com | www.963640.com | 5555724.com | www.971574.com | www.845508.com | 947283.com | 487638.com | www.982829.com | www.987374.com | www.871845.com | www.922019.com | www.886467.com | cai4848.com | 129940.com | www.968495.com | www.745094.com | www.562053.com | www.355203.com | www.579709.com | www.402226.com | www.736972.com | www.560607.com | www.433443.com | www.300070.cc | www.328096.com | www.123256.com | www.257199.com | www.069957.com | www.12376.com | www.219.tv | www.tk13.cc | 537176.com | 951457.com | www.969015.com | www.696479.com | www.502508.com | www.255860.com | www.518733.com | www.404102.com | www.509152.com | www.365730.cc | www.605527.com | www.797208.com | www.749048.com | www.709043.com | www.631371.com | www.804441.com | 156884.com | www.899398.com | www.788035.com | www.787658.com | www.974210.com | www.840102.com | 672720.com | 网易彩票www.26163l.com | 242249.com | 598213.com | 416774.com | 326553.com | 378445.com | 284895.com | 37zq.com | www.969413.com | 893160.com | www.239108.com | www.128573.com | www.001100.com | www.76238.com | www.154503.com | www.159064.com | www.078673.com | www.81160.com | www.119271.com | www.608598.com | www.506306.com | www.981700.com | www.y88.me | www.04ky.com | www.vt18.com | www.65rp.com | www.3vc.cc | www.x36.bid | www.jj42.com | www.2445.pw | www.10811.com | www.37966.com | www.179558.com | www.357175.com | www.371185.com | www.380053.com | www.570378.com | 230976.com | www.980651.com | www.810089.com | www.678991.com | www.568342.com | www.411537.com | www.356449.com | www.327733.com | www.287570.com | www.247191.com | www.304373.com | www.400682.com | www.397068.com | www.529138.com | www.574941.com | www.470543.com | www.431197.com | www.317139.com | www.236500.com | www.083400.com | www.78355.cc | www.52133.cc | www.33046.com | www.8022.org | www.93094.com | www.042944.com | www.081046.com | www.006343.com | www.18376.com | www.5188.me | www.17905.com | www.029034.com | www.57050.com | www.027648.com | www.33336.com | www.21605.com | www.85969.cc | www.574462.com | www.482162.com | www.298225.com | www.386136.com | www.482965.com | www.355084.com | www.605093.com | www.759311.com | www.696055.com | www.851595.com | www.939350.com | www.822467.com | www.722576.com | www.18976.cc | www.107036.com | www.021641.com | www.65438.com | www.361880.com | www.362312.com | www.327519.com | www.184503.com | www.144022.com | www.105233.com | www.87665.cc | www.373455.com | www.443755.com | www.505886.com | www.551181.com | www.329391.com | www.152538.com | www.065118.com | www.354376.com | www.309726.com | www.335797.com | www.368229.com | www.512844.com | www.795225.com | 474178.com | 幸运彩票www.768299.com | 465116.com | 063518.com | 964419.com | 106751.com | 392695.com | 919756.com | K彩www.kc56.com | 516882.com | 396760.com | 163308.com | www.978905.com | 062358.com | www.981453.com | 086234.com | www.819956.com | www.947399.com | www.983489.com | www.829357.com | www.791434.com | www.937776.com | 988505.com | www.933458.com | www.728074.com | www.586264.com | 821140.com | www.xpj508.com | 5428.com | 大赢家彩票平台www.292726.com | 694378.com | www.bt11.com | 496705.com | 651019.com | 580389.com | www.996441.com | www.889553.com | www.8944.com | www.876368.com | 358854.com | 135090.com | www.965980.com | www.737272.com | www.556748.com | www.337756.com | www.502101.com | www.760413.com | www.661407.com | www.772424.com | 616717.com | www.960778.com | www.786169.com | www.970263.com | www.822218.com | www.873240.com | www.870866.com | www.808544.com | www.645632.com | www.934482.com | www.773119.com | www.558129.com | www.757104.com | www.491405.com | www.219766.com | www.024372.com | www.8181.biz | 大赢家彩票网www.910977.com | 392050.com | 870505.com | www.906062.com | 783228.com | www.937158.com | www.569369.com | www.872145.com | 687202.com | 31488.cc | 131697.com | www.861380.com | www.752258.com | www.12kg.com | www.6657.pw | www.hv47.com | 357507.com | www.6118.in | www.8735.com | www.43ky.com | 740366.com | 08352.com | www.55yf.com | 七彩www.53900e.com | 493005.com | 504180.com | www.976894.com | www.739478.com | www.563503.com | www.297963.com | www.732338.com | www.615575.com | www.501973.com | www.557687.com | www.310500.com | www.181467.com | www.101810.com | www.372639.com | www.583673.com | www.919508.com | www.849825.com | www.791610.com | www.799842.com | www.713918.com | www.495227.com | www.295783.com | www.203332.com | www.801348.com | www.769603.com | 286127.com | www.958001.com | www.568427.com | www.250982.com | www.007800.com | www.yj10.com | 644749.com | www.842079.com | www.718396.com | www.288397.com | www.68007.cc | www.0186.vip | 凤凰彩票www.77801n.com | 604711.com | www.958425.com | www.610040.com | www.837067.com | www.962010.com | www.742366.com | www.852044.com | www.949028.com | www.958362.com | www.814444.com | www.610271.com | www.500058.com | cp1518.com | 295949.com | 159881.com | www.985887.com | www.922137.com | www.808707.com | www.919218.com | www.855751.com | www.771912.com | www.865608.com | www.773946.com | www.833698.com | www.733336.com | www.796453.com | www.862033.com | www.742900.com | www.509819.com | www.303258.com | www.828775.com | www.949684.com | www.733185.com | www.539215.com | www.299032.com | www.300062.com | www.227461.com | www.23599.com | www.100788.com | www.080495.com | www.367586.com | www.818366.com | www.624563.com | www.511515.com | www.080062.com | www.419.online | 鑫亿彩www.051069.com | www.965683.com | www.558583.com | www.133241.com | www.8877.hk | www.cp9733.com | 456466.com | www.662368.com | www.557148.com | www.123483.cc | www.6870.cc | www.47963.com | www.15351.com | www.el3.com | 639530.com | www.703316.com | www.282710.com | www.052213.com | www.df0.cc | www.842255.com | www.550248.com | www.51qp.cc | 027087.com | www.923532.com | www.391775.com | www.w33.net | www.5604.xyz | www.ya63.com | www.853253.com | www.183365.com | www.040133.com | www.028666.cc | www.59qf.com | 110039.com | www.755209.com | www.349897.com | www.49688.cc | www.70eu.com | 548009.com | www.901532.com | www.692168.com | www.722875.com | www.365600.cc | www.50489.com | www.67793.cc | www.50110.com | www.74435.com | www.06317.com | www.vh80.com | 280036.com | 9971.net | www.870359.com | www.837393.com | www.693884.com | www.486035.com | www.263862.com | www.099763.com | www.00304.com | www.85ht.com | www.yw72.com | www.8853.win | www.06ge.com | aq37.com | 191173.com | www.893267.com | www.606207.com | www.335173.com | www.113057.com | www.30119.com | www.59ly.com | www.35ng.com | 天天彩票www.106356.com | 65553.com | www.933974.com | www.637468.com | www.570183.com | www.555525.com | www.376200.com | www.411897.com | www.351548.com | www.123242.com | www.26339.cc | www.72ky.com | 104886.com | cp8700.com | www.870447.com | www.557895.com | www.431156.com | www.162392.com | www.071890.com | www.542094.com | www.1643.vip | www.t11.me | 博亿彩票www.664by.com | 328848.com | www.945963.com | www.685188.com | www.407146.com | www.561458.com | www.522775.com | www.386336.com | www.425172.com | www.182845.com | www.055636.com | www.5522.hk | www.9013.biz | www.11dd.cc | www.ws71.com | 918898.com | 100449.com | www.905515.com | www.621883.com | www.706995.com | www.458632.com | www.222942.com | www.019440.com | www.3869.in | www.ff05.com | www.cai5596.com | 116078.com | www.944684.com | www.646690.com | www.500765.com | www.241789.com | www.091155.com | www.12273.com | www.3377.pw | www.jw83.com | qo38.com | 51212.com | www.819133.com | www.556680.com | www.264655.com | www.651708.com | www.587355.com | www.367228.com | www.450858.com | www.263692.com | www.10641.com | www.8061.biz | www.265.xyz | www.36gd.com | www.x69.shop | 500万彩票www.911283.com | 563679.com | 028294.com | 678405.com | www.958084.com | www.670047.com | www.507273.com | www.398665.com | 819688.com | www.836408.com | www.850303.com | www.831181.com | www.654433.com | www.619686.com |