The Sun’s dynamic extended corona observed in extreme ultraviolet

  title={The Sun’s dynamic extended corona observed in extreme ultraviolet},
  author={Daniel B. Seaton and John M. Hughes and Sivakumar S. K. Tadikonda and Amir Caspi and Craig E. Deforest and Alexander Krimchansky and Neal E. Hurlburt and Ralph Seguin and Gregory L. Slater},
  journal={Nature Astronomy},
The “middle corona” is a critical transition between the highly disparate physical regimes of the lower and outer solar corona. Nonetheless, it remains poorly understood due to the difficulty of observing this faint region (1.5–3 R☉). New observations from the GOES Solar Ultraviolet Imager in August and September 2018 provide the first comprehensive look at this region’s characteristics and long-term evolution in extreme ultraviolet (EUV). Our analysis shows that the dominant emission mechanism… 

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