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

鸿运彩票www.hy2522.com 439925.com | www.081752.com | www.226707.com | 966754.com | www.940515.com | 411901.com | www.f23.top | www.044325.com | www.726673.com | www.923392.com | www.043177.com | www.469521.com | www.716266.com | www.6788.date | www.44487.cc | www.666174.com | 123828.com | www.397008.com | www.500155.cc | www.704200.com | www.4767.xyz | www.506527.com | www.1164.net | www.78239.com | www.1778.in | www.220173.com | www.76726.com | 657275.com | www.406418.com | www.311777.com | www.553686.com | 901378.com | www.022265.com | www.673079.com | www.786275.com | 015937.com | 800205.com | www.63tc.com | www.89088.com | www.3411.xyz | 918784.com | www.5672.pw | www.949534.com | www.915009.com | www.38717.cc | www.3709.com | www.c1.org | www.030067.com | www.229381.com | www.r35.cm | 博乐彩票www.506969.com | www.839609.com | 86ih.com | 964835.com | www.42945.com | www.445872.com | www.316952.com | www.026165.com | www.017064.com | www.604467.com | www.867153.com | www.920916.com | www.269700.com | www.dm29.com | wz74.cc | www.99427.com | www.977522.com | www.n51.shop | www.783522.com | www.186742.com | www.420005.com | www.81gd.com | www.303259.com | www.d47.com | www.648986.com | 222040.com | www.cd98.cc | www.444036.com | www.76058.com | www.4416.me | www.hr95.com | www.139973.cc | www.863698.com | www.064793.com | www.737038.com | www.k46.cc | www.644410.com | www.887499.com | 彩神帝www.826556.com | 322670.com | 彩82www.128082.com | www.702662.com | www.875922.com | www.88860.cc | www.007995.com | www.297983.com | www.vi35.com | www.4943.vip | www.cp3770.com | www.66187.cc | www.022780.com | www.11709.com | www.622389.com | www.xs00.com | www.252787.com | www.365056.com | 036762.com | www.564623.com | www.021837.com | www.330642.com | www.5156.net | www.62kp.com | www.35597.cc | www.919377.com | www.956511.com | 987111.cc--tkcp.cc | www.06eu.com | www.35826.cc | www.238707.com | 958429.com | www.567170.com | 604956.com | www.771613.com | 054503.com | 480054.com | www.229547.com | www.615772.com | www.609.tv | www.870743.com | 773085.com | www.564569.com | www.773394.com | www.489587.com | www.87664.com | www.577750.com | www.404105.com | 330978.com | www.869975.com | www.65mj.com | www.10123.com | www.8092.cn | 000443.com | www.585328.com | 654284.com | 362610.com | www.761175.com | 9242.biz | www.13512.cc | www.120184.com | www.562815.com | www.55978.com | www.375818.cc | 902389.com | www.769298.com | www.984395.com | www.76pz.com | www.051761.com | www.877551.com | www.33rm.com | www.381984.com | 003033.com | www.829068.com | 160274.com | 072067.com | www.247.cx | 大赢家彩票www.599424.com | 086036.com | 彩民村www.88cmc.com | 99福彩www.316686.com | 梦想彩票www.33112p.com | www.qq09.com | www.647910.com | www.954811.com | www.60039.cc | www.239181.com | www.636851.com | www.t82.club | www.061094.com | www.964108.com | 62485.com | 235214.com | www.518012.com | 670642.com | 全民彩票www.qm72.com | www.qu34.com | www.941353.com | www.171825.com | www.492732.com | www.740700.com | www.7411.wang | www.442777.com | www.z26.in | www.765500.com | www.79931.cc | www.5145.vip | 彩民村www.88cmc.com | www.29ct.com | www.576533.com | www.891121.com | www.81755.com | www.604636.com | www.70nl.com | www.904000.com | www.51cz.com | www.977574.com | www.cai6311.com | www.456.org | 030017.com | www.254051.com | www.cp3568.com | 彩票500万www.295207.com | www.m33.pw | www.958819.com | www.782753.com | www.41025.com | www.110311.com | www.261064.cc | www.58eh.com | www.434094.com | www.944826.com | www.988875.com | 058931.com | www.92tg.com | www.2307.vip | www.036013.com | 9137.biz | 840039.com | 211157.com | 248825.com | www.cx79.com | 凤凰彩票www.606510.com | www.587.cn | www.276648.com | www.987202.com | www.976028.com | 125411.com | 488315.com | www.3099.pw | www.03922.com | www.9071.loan | www.01362.com | www.122104.com | www.259781.com | www.10202.com | www.635035.com | www.80360.com | www.796884.com | www.114265.com | www.331825.com | www.365600.com | www.595697.com | www.7305.cn | www.638108.com | www.878499.com | www.838283.com | www.949427.com | 682288.com | www.969803.com | www.113589.com | www.192567.com | www.22234.com | www.101871.com | www.852873.com | www.338914.com | www.341763.com | 672609.com | 500彩票www.52072j.com | www.036812.com | www.805735.com | 034041.com | 668702.com--888960.com | www.pz91.com | www.3790.cc | www.160771.com | www.829205.com | 026821.com | www.477258.cc | 970724.com | www.62557.cc | 781724.com | www.233437.com | www.188977.cc | www.488777.cc | www.771312.com | www.103212.com | www.cai7277.com | www.un64.com | www.47729.com | 110465.com | www.jj17.com | 845857.com | www.10re.com | 017118.com | www.609398.com | www.gw67.com | www.054821.com | www.322005.com | www.bs9889.com | 天天彩www.cp718.vip | www.916307.com | www.aq31.com | www.xu13.com | www.284151.com | www.456414.com | www.575198.com | 962416.com | www.1313.cc | 成功彩票www.le33.cc | www.394979.com | www.dz90.com | www.83ts.com | www.821550.com | www.936701.com | www.4355.com | www.090090.com | 345985.com | www.736203.com | www.368713.com | www.560223.com | 3079.biz | www.cp1190.com | www.07529.com | www.916938.com | www.me72.com | www.866.site | www.647688.com | www.663444.com | www.0444.me | www.789354.com | www.836177.com | www.05zp.com | www.cp5938.com | www.561817.com | www.593722.com | www.365875.cc | www.256277.com | www.050502.com | www.848502.com | www.7649.cc | www.448854.com | www.813314.com | www.98qf.com | www.539432.com | www.219722.com | www.06fi.com | www.171202.com | 234057.com | www.4306.vip | www.322648.com | www.191975.com | www.665725.com | www.3504.cc | www.eu88.com | www.96856.com | www.077161.com | 4784.biz | www.654546.com | 594605.com | www.xv75.com | www.298575.com | 373062.com | www.361615.com | www.166086.com | www.956799.com | 978131.com | 708740.com | www.372541.com | www.o22.net | www.2076.org | www.405115.com | www.405933.com | www.765223.com | www.fl60.com | www.064901.com | www.058083.com | www.sl78.com | www.my49.com | www.c62.top | www.hg74.com | 凤凰彩票www.77801l.com | 210065.com | www.095858.com | www.z22.in | 927906.com | 122867.com | www.43694.com | www.272336.com | www.645555.com | www.134340.com | www.142856.com | www.807526.com | www.652066.cc | www.93zt.com | www.446668.cc | www.541048.com | 735942.com | www.909678.com | www.962606.com | www.595717.com | www.rk61.com | 380599.com | www.02bo.com | www.424718.com | www.55fc.cc | www.fi45.com | 好运彩吧www.027107.com | www.879557.com | 223154.com | www.687100.com | 亿彩堂www.87668x.com | www.np81.com | www.8976.online | www.96651.com | www.14451.com | www.14.cm | www.2724.xyz | www.750962.com | www.19038.com | www.783.cn | www.899745.com | 579634.com | www.cb66.com | www.ku83.com | 365414.cc | www.954057.com | www.5760.cm | www.288912.com | www.331302.com | www.403643.com | www.47qy.com | www.623702.com | 306596.com | www.f86.cc | www.318443.com | 5382.biz | www.995050.com | www.364650.com | www.634957.com | 247654.com | www.003476.com | 16rt.cc | www.ok58.com | www.36658.cc | www.098405.com | www.098803.com | www.71zn.com | www.5861.top | www.55517.com | www.497800.com | www.711365.cc | 99250a.com | www.uh95.com | 天下彩www.344680.com | www.01506.com | www.770232.com | 4967.biz | cp768.cc | 902486.com | www.315931.com | www.703076.com | www.5731.biz | www.063322.com | www.63lj.com | www.26236.com | www.15681.cc | www.930367.com | www.695803.com | www.72kj.cc | www.174068.com | www.096113.com | www.28369.cc | 794334.com | www.550492.com | www.665696.com | 657451.com | www.8476.cc | www.5708.vip | www.3812.biz | www.6677.cm | www.001972.com | www.549958.com | www.385255.com | www.ek82.com | www.1qd.cc | www.0000.cx | www.36687.cc | www.417818.com | www.31lr.com | 641258.com | cai4447.com | 759333.com | www.780882.com | www.929197.com | www.vl64.com | www.177.red | www.48561.com | www.74143.com | www.151567.com | www.465166.com | www.889933.com | www.879300.com | 951966.com | www.22wa.com | 222241.com | www.914613.com | 001932.com | www.9289.cn | www.316208.com | www.508325.com | www.309089.com | www.290529.com | www.785708.com | 277307.com | 博通彩票www.694050.com | www.308201.com | www.sw73.com | www.609111.cc | www.426228.com | www.110549.com | www.00035.cc | www.802528.com | www.734535.com | www.535365.com | 512037.com | www.230397.com | www.578529.com | www.617677.com | www.818486.com | www.84474.com | www.311758.com | www.66ej.com | www.822543.com | www.8598.site | www.33qx.com | www.020349.com | www.199046.com | www.315018.com | 187586.com | 927236.com | 261419.com | www.ao57.com | www.0736.xyz | www.96289.com | www.733127.com | www.67gn.com | www.961479.com | www.0329.cn | www.758378.com | www.984362.com | 326106.com | 977495.com | 496001.com | www.v22.com | www.7066.xyz | www.152550.com | www.366694.com | www.640251.com | www.378956.com | www.603839.com | www.006489.com | 770089.com | www.352925.com | 9365.net | www.35156.cc | www.52405.cc | www.77720.com | www.4323.xyz | www.843885.com | www.ql79.com | www.698659.com | www.33253.cc | www.68765.cc | www.212014.com | www.592708.com | www.043778.com | www.163541.com | www.679752.com | www.809498.com | www.587269.com | www.606646.com | www.716209.com | www.127565.com | www.186384.com | www.610267.com | 072633.com | 322503.com | 816400.com | www.15an.com | www.17fh.com | 026284.com | www.988772.com | www.883489.com | www.742599.com | www.334429.com | 554786.com | www.865707.com | 695960.com | 772422.com | www.tt75.cc | 爱彩www.014ac.com | 33552.com | 703774.com | www.28527.com | zzbet.com | cp5123.com | 556358.com | www.545551.com | www.ei11.com | www.0762.xyz | www.79611.com | www.115117.com | www.755861.com | www.769743.com | www.725353.com | www.531813.com | www.688243.com | 244134.com | www.g20.me | www.76ut.com | www.782.red | www.25911.cc | www.56qc.com | www.kq93.com | 爱米彩www.am5432.com | 243311.com | www.978905.com | www.671982.com | www.522182.com | www.424132.com | www.345324.com | www.213894.com | www.07125.com | www.22246.com | www.2244.vip | 100455.com | 960694.com | 342255.com | 网易彩票www.36788w.com | www.2689.net | www.2gf.com | www.ss68.cc | 237413.com | www.13no.com | www.cb02.com | www.593508.com | www.532077.com | 688470.com | 060832.com | 631369.com | pu84.com | 大赢家彩票平台www.320160.com | www.387671.com | www.16968.cc | www.025506.com | www.52153.com | 358994.com | 728157.com | www.4089.biz | www.9065.vip | www.002987.com | www.663020.com | www.731384.com | www.643062.com | www.857969.com | 357726.com | 309034.com | 781442.com | www.0472.loan | www.170007.com | www.060480.com | www.844431.com | www.9800.cn | www.635066.cc | www.53234.cc | 500彩票www.303473.com | www.519895.com | www.334219.com | www.37571.cc | www.66955.com | www.545514.com | www.455538.com | www.2qg.com | www.31599.cc | www.98cw.com | www.8ki.com | www.030323.com | www.97991.cc | www.030408.com | www.41596.com | www.741622.com | www.345947.com | 347638.com | 964472.com | www.90oy.com | www.11lc.com | www.0751.cc | www.7046.top | www.088670.com | www.8883.cm | www.882747.com | www.0154.pw | www.441194.com | www.399562.cc | 754068.com | www.982669.com | 479761.com | www.507774.com | www.693192.com | www.619788.com | www.265164.com | www.128062.com | www.024351.com | www.620590.com | www.423253.com | www.751623.com | 975854.com | www.951347.com | www.766766.com | www.195252.cc | 222870.com | 138747.com | www.268030.com | 530730.com | www.32rf.com | 848414.com | www.192292.com | www.py89.com | www.23399.cc | www.590832.com | www.0393.com | www.706.hk | www.26853.cc | www.626117.com | 197744.com | 679201.com | 26wu.com | www.24.la | www.265609.com | 874896.com | 中国福利彩票www.6364e.com | 037705.com | www.552161.com | www.28561.cc | 257529.com | 365266.cc | www.32ws.com | www.544605.com | www.636760.com | www.582736.cc | 313506.com | 772960.com | 168491.com | 102594.com | www.5645.vip | www.3940.cc | www.123254.com | www.538724.com | www.899133.com | www.53593.cc | www.429567.com | www.568672.com | www.52dj.com | www.156450.com | www.079720.com | www.356934.com | www.80166.com | www.135560.com | www.135809.com | 491914.com | www.cu81.com | www.552400.cc | www.ee0.cc | www.515173.com | www.qc97.com | www.201586.com | www.879544.com | www.851995.com | 369545.com | www.079568.com | www.971255.com | www.235665.com | zm6.com | www.27tv.com | 澳客彩票www.108ak.com | www.359339.com | 120289.com | 954484.com | www.71xc.com | 东方国际www.055976.com | www.19bu.com | www.55878.com | 02167.com | 020310.com | 88彩票www.8839m.com | www.ge30.com | 290402.com | www.75qf.com | www.912276.com | www.951429.com | www.9042.cm | www.663940.com | www.915381.com | www.cv72.com | www.46827.com | www.101162.com | www.169532.com | www.147257.com | www.030303.com | www.