Properties of the Sheath Regions of Coronal Mass Ejections with or without Shocks from STEREO in situ Observations near 1 au

@article{Salman2020PropertiesOT,
  title={Properties of the Sheath Regions of Coronal Mass Ejections with or without Shocks from STEREO in situ Observations near 1 au},
  author={Tarik M. Salman and No{\'e} Lugaz and Charles J. Farrugia and R{\'e}ka M. Winslow and Lan K. Jian and Antoinette B. Galvin},
  journal={The Astrophysical Journal},
  year={2020},
  volume={904}
}
We examine 188 coronal mass ejections (CMEs) measured by the twin Solar Terrestrial Relations Observatory spacecraft during 2007–2016 to investigate the generic features of the CME sheath and the magnetic ejecta (ME) and dependencies of average physical parameters of the sheath on the ME. We classify the CMEs into three categories, focusing on whether the ME drives both a shock and sheath, or only a sheath, or neither, near 1 au. We also re-evaluate our initial classification through an… 

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