...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Space Science Reviews >Quasi-Periodic Pulsations in Solar Flares
【24h】

Quasi-Periodic Pulsations in Solar Flares

机译：太阳耀斑的准周期脉动

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

Quasi-periodic pulsations (QPP) are a common feature of flaring energy releases in the solar atmosphere, observed in all bands, from radio to hard X-ray. In this review we concentrate on QPP with the periods longer than one second. Physical mechanisms responsible for the generation of long QPP split into two groups: “load/unload” mechanisms and MHD oscillations. Load/unload mechanisms are repetitive regimes of flaring energy releases by magnetic reconnection or by other means. MHD oscillations can affect all elements of the flaring emission generation: triggering of reconnection and modulation of its rate, acceleration and dynamics of non-thermal electrons, and physical conditions in the emitting plasmas. In the case of MHD oscillations, the periodicity of QPP is determined either by the presence of some resonances, e.g. standing modes of plasma structures, or by wave dispersion. Periods and other parameters of QPP are linked with properties of flaring plasmas and their morphology. Observational investigation of the QPP generation mechanisms based upon the use of spatial information, broadband spectral coverage and multi-periodicity is discussed. Keywords Magnetohydrodynamics and plasmas - Flares - Magnetohydrodynamic waves - Magnetic reconnection
机译：准周期脉动（QPP）是在从无线电到硬X射线的所有波段中观察到的在太阳大气中爆发的能量释放的共同特征。在这篇评论中，我们将重点放在QPP上，其周期超过一秒。导致长QPP产生的物理机制分为两类：“加载/卸载”机制和MHD振荡。加载/卸载机制是通过磁重新连接或通过其他方式释放能量的重复方式。 MHD振荡会影响火炬发射产生的所有要素：触发重新连接和调制其速率，非热电子的加速和动力学以及发射等离子体中的物理条件。在MHD振荡的情况下，QPP的周期由某些共振的存在来决定，例如等离子体结构的驻波模式，或通过波散射。 QPP的周期和其他参数与扩口等离子体的性质及其形态有关。讨论了基于空间信息，宽带频谱覆盖和多周期的QPP生成机制的观测研究。关键词磁流体动力学和等离子体-耀斑-磁流体动力学波-磁重联

著录项

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