...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Solar physics >A Statistical Study of CME Properties and of the Correlation Between Flares and CMEs over Solar Cycles 23 and 24
【24h】

A Statistical Study of CME Properties and of the Correlation Between Flares and CMEs over Solar Cycles 23 and 24

机译：CME特性的统计研究及光晕和CMES在太阳循环23和24之间的相关性

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

We investigated some properties of coronal mass ejections (CMEs), such as speed, acceleration, polar angle, angular width, and mass, using data acquired by the Large Angle Spectrometric Coronagraph (LASCO) onboard the Solar and Heliospheric Observatory (SOHO) from 31 July 1997 to 31 March 2014, i.e. during the Solar Cycles 23 and 24. We used two CME catalogs: one provided by the Coordinated Data Analysis Workshops (CDAW) Data Center and one obtained by the Computer Aided CME Tracking software (CACTus) detection algorithm. For each dataset, we found that the number of CMEs observed during the peak of Cycle 24 was higher than or comparable to the number during Cycle 23, although the photospheric activity during Cycle 24 was weaker than during Cycle 23. Using the CMEs detected by CACTus, we noted that the number of events [N] is of the same order of magnitude during the peaks of the two cycles, but the peak of the CME distribution during Cycle 24 is more extended in time (N > 1500 during 2012 and 2013). We ascribe the discrepancy between the CDAW and CACTus results to the observer bias for CME definition in the CDAW catalog. We also used a dataset containing 19,811 flares of C-, M-, and X-class observed by the Geostationary Operational Environmental Satellite (GOES) during the same period. Using both datasets, we studied the relationship between the mass ejected by the CMEs and the flux emitted during the corresponding flares: we found 11,441 flares that were temporally correlated with CMEs for CDAW and 9120 for CACTus. Moreover, we found a log-linear relationship between the flux of the flares integrated from the start to end in the 0.1 - 0.8 nm range and the CME mass. We also found some differences in the mean CMEs velocity and acceleration between the events associated with flares and those that were not.
机译：我们研究了冠状质量喷射（CMES）的一些性质，例如速度，加速度，极角，角度宽度和质量，使用由31个大角度光谱调节件（Lasco）所获取的数据从31开始1997年7月至2014年3月31日，即在太阳循环中，我们使用了两个CME目录：由协调数据分析研讨会（CDAW）数据中心提供的CME目录，以及由计算机辅助CME跟踪软件（Cactus）检测算法获得的CME目录。对于每个数据集，我们发现在循环24峰值期间观察到的CME的数量高于或与循环23期间的数量相当，尽管循环24期间的射击期活性比在循环23期间较弱。使用由仙人掌检测到的CME ，我们注意到，在两个周期的峰期间，事件[n]的数量是相同的数量级，但是在循环24期间的CME分布的峰值在时间（n> 1500期间，2012年和2013期间） 。我们将CDAW和Cactus之间的差异归类为CDAW目录中的CME定义的观察者偏置。我们还使用了在同一时期内地球静止运营环境卫星（GOSE）观察到的19,811型C-，M-和X类的数据集。使用两个数据集，我们研究了由CMES弹出的质量与相应耀斑期间发射的磁通之间的关系：我们发现11,441耀斑与CAW的CMES与CACTUS暂时相关。此外，我们发现从开始到0.1- 0.8nm范围内的耀斑的通量之间的对数线性关系，并在0.1-0.8nm范围内和CME质量。我们还发现了与耀斑相关联的事件和不存在的事件之间的平均CMES速度和加速度的一些差异。

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