首页> 外文期刊>Solar Physics >Periodicities in the Time Series of Solar Coronal Radio Emissions and Chromospheric uv Emission Lines
【24h】

Periodicities in the Time Series of Solar Coronal Radio Emissions and Chromospheric uv Emission Lines

机译:太阳日冕无线电发射和紫外线uv线的时间序列中的周期

获取原文
获取原文并翻译 | 示例
           

摘要

A spectral analysis of the time series of daily values of ten solar coronal radio emissions in the range 275–1755 MHz, the 2800 MHz radio flux, several UV emission lines in the chromosphere and in the transition region, and sunspot number, for six successive intervals of 132 days each, during June 1997–July 1999 (26 months) showed that the spectral characteristics were not the same for all intervals. Details are presented for Interval 1, where there was no 27-day oscillation, and Interval 2, where there was a strong 27-day oscillation. In every interval, periodicities were remarkably similar in most of these indices, indicating that the solar atmosphere (chromosphere and corona) rotated as one block, up to a height of ∼ 150 000 km. Above this height, the periodicities became obscure. Near the solar surface, sunspots showed extra or different periodicities, some of which vanished at low altitudes. For the 27-day feature as also for the long-term rise during 1996–1998, the maximum percentage changes were for radio emissions near 1350–1620 MHz.
机译:连续六次连续10次太阳日冕射电在275-1755 MHz范围内的日值,2800 MHz射通量,色球和过渡区域中的几条紫外线发射线以及黑子数的日序列的频谱分析在1997年6月至1999年7月(26个月)内,每隔132天的间隔显示光谱特征并非在所有间隔内都相同。详细介绍了间隔27(没有27天的波动)和间隔2(有27天的强劲波动)的详细信息。在每个时间间隔中,大多数这些指数的周期性都非常相似,这表明太阳大气(色球和日冕)作为一个整体旋转,直至约15万公里。在此高度以上,周期性变得晦涩难懂。在太阳表面附近,黑子表现出额外的或不同的周期性,其中一些在低空消失。对于27天的特征以及1996–1998年的长期上升,最大的百分比变化是在1350–1620 MHz附近的无线电发射。

著录项

  • 来源
    《Solar Physics》 |2002年第2期|351-359|共9页
  • 作者

    R.P. Kane;

  • 作者单位

    Instituto Nacional de Pesquisas Espacias;

  • 收录信息
  • 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