Corotating Interaction Regions as Seen by the STEREO Heliospheric Imagers 2007 – 2010

被引:0
作者
T. M. Conlon
S. E. Milan
J. A. Davies
A. O. Williams
机构
[1] University of Leicester,RSPPG, Department of Physics and Astronomy
[2] STFC Rutherford Appleton Laboratory,RAL Space
[3] University of St. Andrews,School of Mathematics and Statistics
来源
Solar Physics | 2015年 / 290卷
关键词
Corotating interaction regions; Solar wind;
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摘要
NASA’s Solar Terrestrial Relations Observatory (STEREO) mission has coincided with a pronounced solar minimum. This allowed for easier detection of corotating interaction regions (CIRs). CIRs are formed by the interaction between fast and slow solar-wind streams ejected from source regions on the solar surface that rotate with the Sun. High-density plasma blobs that have become entrained at the stream interface can be tracked out to large elongations in data from the Heliospheric Imager (HI) instruments onboard STEREO. These blobs act as tracers of the CIR itself such that their HI signatures can be used to estimate CIR source location and radial speed. We estimate the kinematic properties of solar-wind transients associated with 40 CIRs detected by the HI instrument onboard the STEREO-A spacecraft between 2007 and 2010. We identify in-situ signatures of these transients at L1 using the Advanced Composition Explorer (ACE) and compare the in-situ parameters with the HI results. We note that solar-wind transients associated with CIRs appear to travel at or close to the slow solar-wind speed preceding the event as measured in situ. We also highlight limitations in the commonly used analysis techniques of solar-wind transients by considering variability in the solar wind.
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页码:2291 / 2309
页数:18
相关论文
共 254 条
[1]  
Acuña M.H.(2008)The STEREO/IMPACT magnetic field experiment Space Sci. Rev. 136 203-undefined
[2]  
Curtis D.(2006)Differences between CME-driven storms and CIR-driven storms J. Geophys. Res. 111 3935-undefined
[3]  
Scheifele J.L.(2014)Assessing the effect of spacecraft motion on single-spacecraft solar wind tracking techniques Solar Phys. 289 167-undefined
[4]  
Russell C.T.(2009)A synoptic view of solar transient evolution in the inner heliosphere using the Heliospheric Imagers on STEREO Geophys. Res. Lett. 36 319-undefined
[5]  
Schroeder P.(2013)Establishing a stereoscopic technique for determining the kinematic properties of solar wind transients based on a generalized self-similarly expanding circular geometry Astrophys. J. 777 387-undefined
[6]  
Szabo A.(2012)Predicting the arrival of high-speed solar wind streams at Earth using the STEREO Heliospheric Imagers Space Weather 10 21-undefined
[7]  
Luhmann J.G.(2003)The Solar Mass Ejection Imager (SMEI) Solar Phys. 217 31-undefined
[8]  
Borovsky J.E.(2009)The Heliospheric Imagers onboard the STEREO mission Solar Phys. 254 67-undefined
[9]  
Denton M.H.(1999)Formation and evolution of corotating interaction regions and their three dimensional structure Space Sci. Rev. 89 5-undefined
[10]  
Conlon T.M.(2009)Interplanetary coronal mass ejections observed in the heliosphere: 1. Review of theory Space Sci. Rev. 147 281-undefined