请输入您要查询的字词:

 

单词 coronal plume
释义
coronal plume

Astronomy
  • A faint ray-like feature in the Sun’s corona that extends radially outwards from coronal holes at the Sun’s poles; also referred to as a polar plume. Coronal plumes can be seen at the Sun’s limb in visible light with coronagraphs and during eclipses, as well as at X-ray and ultraviolet wavelengths. The bases of the plumes originate in patches of bright emission in coronal holes. Plumes have been traced out to at least fifteen solar radii on images from the SOHO spacecraft. Plumes are usually denser and cooler than their surroundings, and are most easily identified during solar minimum when coronal holes are clearly seen at the poles of the Sun. There is as yet no conclusive evidence for plumes in equatorial coronal holes, although there is no known reason why they should not also occur at lower latitudes.


随便看

 

科学参考收录了60776条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。

 

Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号 更新时间:2024/12/25 13:22:12