论文标题
长寿命的旋转相互作用区域和相关的复发性降低的通用概况
Generic profile of a long-lived corotating interaction region and associated recurrent Forbush decrease
论文作者
论文摘要
We observe and analyse a long-lived corotating interaction region (CIR), originating from a single coronal hole (CH), recurring in 27 consecutive Carrington rotations 2057-2083 in the time period from June 2007 - May 2009. We studied the in situ measurements of this long-lived CIR as well as the corresponding depression in the cosmic ray (CR) count observed by SOHO/EPHIN throughout different rotations.我们使用关键参数的相对值进行了统计分析以及超跨时期分析：总磁场强度，B，磁场波动，DBRM，血浆流量速度，V，V，等离子体密度，N，等离子体温度，T和SOHO/EPHIN/EPHIN F-DETECTOR粒子粒子和CR计数。我们发现，镜像CR计数时间轮廓与流速的相关性，范围从中等到强相关，具体取决于旋转。此外，我们发现CR计数dip振幅与CIR的磁场和流速中的峰相关。这些结果与以前的统计研究一致。最后，使用超级时期分析，我们获得了一个通用的CIR示例，该示例反映了典型CIR孔的原位特性。根据CIR相关GCR调制的对流扩散方法，更好地解释了我们的结果。此外，从定性上讲，我们的结果与基于不同CHS样本的结果没有差异。这表明，反复出现的CIR从一个旋转变为另一种旋转的物理特性的变化与源自不同CHS的CIR的物理特性的变化在质量上并没有什么不同。最后，根据超级时期分析分析的获得的通用CIR示例可用作测试未来模型的参考。
We observe and analyse a long-lived corotating interaction region (CIR), originating from a single coronal hole (CH), recurring in 27 consecutive Carrington rotations 2057-2083 in the time period from June 2007 - May 2009. We studied the in situ measurements of this long-lived CIR as well as the corresponding depression in the cosmic ray (CR) count observed by SOHO/EPHIN throughout different rotations. We performed a statistical analysis, as well as the superposed epoch analysis, using relative values of the key parameters: the total magnetic field strength, B, the magnetic field fluctuations, dBrms, plasma flow speed, v, plasma density, n, plasma temperature, T , and the SOHO/EPHIN F-detector particle count, and CR count. We find that the mirrored CR count-time profile is correlated with that of the flow speed, ranging from moderate to strong correlation, depending on the rotation. In addition, we find that the CR count dip amplitude is correlated to the peak in the magnetic field and flow speed of the CIR. These results are in agreement with previous statistical studies. Finally, using the superposed epoch analysis, we obtain a generic CIR example, which reflects the in situ properties of a typical CIR well. Our results are better explained based on the combined convection-diffusion approach of the CIR-related GCR modulation. Furthermore, qualitatively, our results do not differ from those based on different CHs samples. This indicates that the change of the physical properties of the recurring CIR from one rotation to another is not qualitatively different from the change of the physical properties of CIRs originating from different CHs. Finally, the obtained generic CIR example, analyzed on the basis of superposed epoch analysis, can be used as a reference for testing future models.
