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• Main Authors: Uri Feldman, Ingolf E. Dammasch, Klaus Wilhelm, Donald M. Hassler, Bruce Battrick
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2003
• Subjects: Editor Layout; South Pole; South pole
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.230.8624; http://ads.harvard.edu/books/2003isua.book/SUMERfirstpages.pdf

High-resolution images of a solar coronal hole obtained by SOHO’s SUMER instrument on 28 and 29 July 1996. These observations in four spectral lines are representative of different temperature regimes in the solar atmosphere. The emission lines from top to bottom are:- Fe XII with a wavelength of 1241.990 Å and a formation temperature of 1.4 x 10 6 K- Mg X with a wavelength of 624.965 Å and a formation temperature of 1.1 x 10 6 K- N V with a wavelength of 1238.821 Å and a formation temperature of 1.9 x 10 5 K, and- C I with a wavelength of 1249.405 Å and a formation temperature of just over 1.3 x 10 4 K. The C I image shows the chromospheric network. Spicules and a pronounced limb brightening can be seen in N V. The Mg X exposure highlights the polar plumes and coronal bright points, whereas the Fe XII image outlines the coronal hole and its boundaries. (The displays of the solar south pole are inverted for graphical reasons.) Published by