An Empirical Model of a Polar Coronal Hole at Solar Minimum

  title={An Empirical Model of a Polar Coronal Hole at Solar Minimum},
  author={Steven R. Cranmer and John L. Kohl and Giancarlo C. Noci and Ester Antonucci and G. Tondello and Martin C. E. Huber and Leonard Strachan and Alexander V. Panasyuk and Larry D. Gardner and Marco Romoli and Silvano Fineschi and Danuta Dobrzycka and John C. Raymond and Piergiorgio Nicolosi and Oswald H. W. Siegmund and Daniele Spadaro and Carlo Benna and Angela Ciaravella and Stefano Giordano and Shadia Rifai Habbal and Margarita Karovska and Xiang Li and Rapha{\"e}l Martin and J. G. Michels and Andr{\'e}a Modigliani and Giampiero Naletto and R L O'neal and Claudio Pernechele and Giannina Poletto and P. L. C. Smith and Raid M. Suleiman},
  journal={The Astrophysical Journal},
We present a comprehensive and self-consistent empirical model for several plasma parameters in the extended solar corona above a polar coronal hole. The model is derived from observations with the SOHO Ultraviolet Coronagraph Spectrometer (UVCS/SOHO) during the period between 1996 November and 1997 April. We compare observations of H I Lyα and O VI λλ1032, 1037 emission lines with detailed three-dimensional models of the plasma parameters and iterate for optimal consistency between measured… Expand
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