• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >Sodium salts in E-ring ice grains from an ocean below the surface of Enceladus
【24h】

Sodium salts in E-ring ice grains from an ocean below the surface of Enceladus

机译：土卫二表面以下海洋中E环冰粒中的钠盐

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Saturn's moon Enceladus emits plumes of water vapour and ice particles from fractures near its south pole, suggesting the possibility of a subsurface ocean. These plume particles are the dominant source of Saturn's E ring. A previous in situ analysis of these particles concluded that the minor organic or siliceous components, identified in many ice grains, could be evidence for interaction between Enceladus' rocky core and liquid water. It was not clear, however, whether the liquid is still present today or whether it has frozen. Here we report the identification of a population of E-ring grains that are rich in sodium salts (～0.5-2% by mass), which can arise only if the plumes originate from liquid water. The abundance of various salt components in these particles, as well as the inferred basic pH, exhibit a compelling similarity to the predicted composition of a subsurface Enceladus ocean in contact with its rock core11. The plume vapour is expected to be free of atomic sodium. Thus, the absence of sodium from optical spectra is in good agreement with our results. In the E ring the upper limit for spectroscopy is insufficiently sensitive to detect the concentrations we found.
机译：土星的月亮土卫二从其南极附近的裂缝中散发出水蒸气和冰粒，这暗示着地下海洋的可能性。这些羽状颗粒是土星E环的主要来源。先前对这些颗粒的原位分析得出的结论是，在许多冰粒中发现的次要有机或硅质成分可能是土卫二的岩心与液态水之间相互作用的证据。但是，目前尚不清楚该液体是否仍然存在或是否已经冻结。在这里，我们报告鉴定出了富含钠盐（约0.5-2％质量）的E环晶粒，只有当羽流来自液态水时才会出现。这些颗粒中各种盐成分的丰富度以及推断的基本pH值，与与岩石核心接触的土生土生的土卫二海洋的预测组成具有惊人的相似性11。羽状蒸气预计不含原子钠。因此，光谱中不存在钠与我们的结果非常吻合。在E环中，光谱的上限对检测我们发现的浓度不够敏感。

著录项

  • 来源
    《Nature》 |2009年第25期|1098-11011161|共5页
  • 作者

    F. Postberg; S. Kempf; J. Schmidt; N. Brilliantov; A. Beinsen; B. Abel; U. Buck; R. Srama;

  • 作者单位

    Institut fuer Geowissenschaften, Universitat Heidelberg, 69120 Heidelberg, Germany Max-Planck-lnstitut fuer Kernphysik, 69117 Heidelberg, Germany;

    Max-Planck-lnstitut fuer Kernphysik, 69117 Heidelberg, Germany IGEP,Technische Universitaet Braunschweig, 38106 Braunschweig, Germany;

    Nichtlineare Dynamik, Universitat Potsdam, 14476 Potsdam-Golm, Germany;

    Department of Mathematics, University of Leicester,Leicester LEI 7RH, UK Department of Physics, Moscow State University, 119991 Moscow, Russia;

    Institut fuer Physikalische Chemie, Universitat Goettingen, 37077 Goettingen, Germany;

    Institut fuer Physikalische Chemie, Universitat Goettingen, 37077 Goettingen, Germany Wilhelm-Oswald-lnstitut fuer Physikalische und Theoretische Chemie, Universitaet Leipzig, 04103 Leipzig, Germany;

    Max-Planck-lnstitut fuer Dynamik und Selbstorganisation, 37073 Gottingen, Germany;

    Max-Planck-lnstitut fuer Kernphysik, 69117 Heidelberg, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号