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全部中文署名,南京大学唯一通讯发science

  • 2026-06-24 06:52:59
全部中文署名,南京大学唯一通讯发science

近日,南京大学天文与空间科学学院谢基伟教授、周济林教授团队联合国内外研究者,利用我国郭守敬望远镜(LAMOST)、欧洲盖亚卫星及美国开普勒太空望远镜的观测数据,首次系统揭示了“超级地球”与“迷你海王星”两类行星具有不同的轨道偏心率—周期关系。这一发现表明,尽管两者尺寸相近,命运却迥然不同:超级地球经历过剧烈的引力散射与巨大撞击,而迷你海王星则长期处于宁静的长期摄动演化之中

相关成果于2026年6月12日以“Super-Earths and mini-neptunes follow different orbital period-eccentricity relations”为题发表在国际顶级期刊《科学》上。

南京大学博士研究生辛科霆、安东升博士共同第一作者谢基伟教授通讯作者南京大学周济林教授、美国夏威夷大学戴飞教授参与了本工作。

在太阳系外,大量行星的半径介于地球与海王星之间,被观测上的“半径谷”分为两类:一类是体积略大于地球、主要由岩石和铁构成的“超级地球”;另一类是体积更大、拥有厚厚气体包层的“迷你海王星”。这两类行星是否仅成分不同,还是连演化过程也本质不同?长期以来,研究者常将它们混为一谈,导致关键动力学规律被掩盖。

研究团队创新性地采用“凌星持续时间比”(TDR)统计方法,结合我国郭守敬望远镜(LAMOST)和欧洲盖亚望远镜(Gaia)提供的高精度恒星参数(质量、半径、年龄、金属丰度等),成功反演出两类行星族群的轨道偏心率分布。结果令人惊讶:“迷你海王星”的轨道偏心率随公转周期变短而显著增加(即周期越短,轨道越扁),呈现反相关趋势,这与经典潮汐圆化理论的预期相反;而“超级地球”则呈现正相关趋势,即周期越短,偏心率越低,周期越长,偏心率越高。

通过理论模型对比,研究团队进一步解释:超级地球的轨道周期—偏心率正相关与行星—行星散射及潮汐圆化理论预测高度一致,表明它们可能经历了剧烈的引力散射、巨大撞击等“暴力事件”,轨道被随机激发后再由潮汐作用拉圆;而迷你海王星的反相关则与“角动量赤字均分”理论相符,表明它们在动力学上“宁静”的系统中,通过长期摄动作用将偏心率由外向内缓慢传递,很少经历剧烈动力学事件。

论文通讯作者谢基伟指出:“‘超级地球’和‘迷你海王星’看似尺寸相近,实则命运迥异——一个生于暴力,一个长于宁静。它们的轨道演化史是我们理解行星系统形成与演化的关键拼图。”

该工作是“行星轨道偏心率趋势”(Planet Orbital Eccentricity Trends,简称POET,意为“诗人”)系列研究的成果之一。“‘诗人’(POET)系列工作的目标是构建行星轨道偏心率与周期、质量、年龄等参数的完整演化图谱,”谢基伟表示,“未来我们将继续拓展到更多行星族群,最终为回答‘地球和太阳系在宇宙中是否特殊’这一终极问题提供科学依据。”

研究得到了国家自然科学基金、国家重点研发计划等的支持。

谢基伟,1984年生于江西省赣州市,现任南京大学天文与空间科学学院教授、副院长,中国天文学会行星专业委员会副主任,中国郭守敬望远镜(LAMOST)科学委员会和用户委员会委员,《天文学报》副主编,被聘为江苏省“首席科技传播专家”,江苏省天文学会“科技传播专家”、“科普校园行专家”,苏州“科普大使”。

1999-2002 毕业于赣州市第三中学,2002-2006年南京大学天文系本科,2006-2011南京大学研究生,2008-2010佛罗里达大学联合培养博士,2011-2013多伦多大学博士后。2014-2020为南京大学天文与空间科学学院副教授。

 主要研究领域为太阳系外行星的普查、形成和演化。2010年获首届教育部博士究生学术新人奖,2012获年江苏省优秀博士论文,2013获全国百篇优秀博士论文奖,2019年得到江苏省杰出青年基金支持,并获得中天文学会第七届“黄授书奖”,亚太地球科学学会(AOGS)“卡米德讲座奖”以及江苏省天文学会科学技术一等奖(第二完成人)。2022年在中国天文学会成立百年纪念大会上被授予“中国天文学会2012-2022年度突出贡献奖”。研究成果曾分别被评为2016年度和2018

年度中国十大天文科技进展。

论文链接(点击文末“阅读原文”可查看全文):

https://www.science.org/doi/10.1126/science.adu3916

版权声明

本文来源:南京大学,版权属于原作者,仅用于学术分享。

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  1. CONNECT:[ UseTime:0.000890s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001517s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000719s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000836s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001499s ]
  6. SELECT * FROM `set` [ RunTime:0.000736s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001715s ]
  8. SELECT * FROM `article` WHERE `id` = 590894 LIMIT 1 [ RunTime:0.001414s ]
  9. UPDATE `article` SET `lasttime` = 1782313286 WHERE `id` = 590894 [ RunTime:0.001496s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000736s ]
  11. SELECT * FROM `article` WHERE `id` < 590894 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001251s ]
  12. SELECT * FROM `article` WHERE `id` > 590894 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001371s ]
  13. SELECT * FROM `article` WHERE `id` < 590894 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002652s ]
  14. SELECT * FROM `article` WHERE `id` < 590894 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002170s ]
  15. SELECT * FROM `article` WHERE `id` < 590894 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002036s ]
0.212805s