A long-lived coronal arch system observed in X-rays |
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| Authors: | J. P. McGuire E. Tandberg-Hanssen K. R. Krall S. T. Wu J. B. Smith D. M. Speich |
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| Affiliation: | (1) Marshall Space Flight Center/NASA, 35812 Huntsville, Alabama, USA;(2) The University of Alabama in Huntsville, 35807 Huntsville, Alabama, USA;(3) Space Environment Lab./ERL, National Oceanic and Atmospheric Administration, 80302 Boulder, Colorado, USA;(4) Present address: NASA/MSFC, USA |
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| Abstract: | A large long-lived soft X-ray emitting arch system was observed during the last Skylab mission. This arcade stayed in the same approximate position for several solar rotations. We suggest that these long-lived arches owe their stability to the stable coronal magnetic-field configuration. A global constant  force-free magnetic field analysis, as developed by Nakagawaet al. (1977), is used to describe the arches, and results in a marked resemblance between the theoretical magnetic-field configuration and the observed X-ray emitting feature. |
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