...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Planetary and space science >Electrostatic lofting of dust aggregates near the terminator of airless bodies and its implication for the formation of exozodiacal disks
【24h】

Electrostatic lofting of dust aggregates near the terminator of airless bodies and its implication for the formation of exozodiacal disks

机译：尘埃聚集体在无气物体的末端附近的静电放空及其对外生圆盘的形成的影响

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

Our current knowledge of launching dust grains from the surfaces of airless bodies appears to contradict in situ observations of dust grains that are lofted off the surface of the Moon. We tackle the issue of high grain stickiness where cohesive forces estimated for compact spherical grains restrict the detachment of the grains from the surfaces of airless bodies. We show that electrostatic forces on irregular grains with rough surfaces, in particular, aggregates of the grains could overcome their cohesive forces, provided that their surfaces are hydroxylated. We also discuss the dynamical consequences of the detachment as to the possibility of grains' hovering over the surfaces of airless bodies. Our results suggest that lofting and hovering of lunar agglutinates take place near the terminator of the Moon but not above the surface of asteroid 25143 Itokawa. The application of our results to extrasolar systems reveals a novel mechanism for the supply of dust aggregates into exozodiacal disks around bright main-sequence stars by electrostatic lofting and subsequent radiative blow-out of the aggregates from sub-km sized airless bodies in the orbit around the stars.
机译：我们目前从无气物体表面发射尘埃颗粒的知识似乎与对从月球表面升起的尘埃颗粒的原位观测相矛盾。我们解决了高颗粒粘性的问题，在该问题中，为紧凑球形颗粒估算的内聚力限制了颗粒与无气物体表面的分离。我们表明，具有粗糙表面的不规则晶粒上的静电力，特别是晶粒的聚集体可以克服其内聚力，只要它们的表面被羟基化即可。我们还讨论了脱粒的动力学后果，即谷物在无气物体表面上盘旋的可能性。我们的结果表明，月球凝集物的俯仰和盘旋发生在月球的终结者附近，而不是在小行星25143 Itokawa的表面之上。我们的结果在太阳系外的应用揭示了一种新颖的机制，该机制可通过静电放样以及随后从轨道周围约千米大小的无气体中辐射散发来将尘埃聚集物供应到明亮的主序恒星周围的外生圆盘中。星星。

著录项

  • 来源
    《Planetary and space science》 |2014年第10期|64-72|共9页
  • 作者

    Hiroshi Kimura; Hiroki Senshu; Koji Wada;

  • 作者单位

    Graduate School of Science, Kobe University, c/o CPS (Center for Planetary Science), Chuo-ku Minatojima Minamimachi 7-1-48, Kobe 650-0047, Japan;

    Planetary Exploration Research Center (PERC), Chiba Institute of Technology (Chitech), Tsudanuma 2-17-1, Narashino, Chiba 275-0016, Japan;

    Planetary Exploration Research Center (PERC), Chiba Institute of Technology (Chitech), Tsudanuma 2-17-1, Narashino, Chiba 275-0016, Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Circumstellar matter; Dust; Meteorites; Meteors; Meteoroids; Minor planets; Asteroids: general; Moon;

    机译：绕星物质;灰尘;陨石;流星;流星体;小行星;小行星：一般;月亮;

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