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THE SOURCE OF 3 MINUTE MAGNETOACOUSTIC OSCILLATIONS IN CORONAL FANS
We use images of high spatial, spectral, and temporal resolution, obtained using both ground- and space-based instrumentation, to investigate the coupling between wave phenomena observed at numerous heights in the solar atmosphere. Analysis of 4170 A continuum images reveals small-scale umbral inten...
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Published in: | The Astrophysical journal 2012-10, Vol.757 (2), p.1-14 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | We use images of high spatial, spectral, and temporal resolution, obtained using both ground- and space-based instrumentation, to investigate the coupling between wave phenomena observed at numerous heights in the solar atmosphere. Analysis of 4170 A continuum images reveals small-scale umbral intensity enhancements, with diameters ~0".6, lasting in excess of 30 minutes. We find a maximum waveguide inclination angle of approximately 40[degrees] between photospheric and chromospheric heights, combined with a radial expansion factor of |
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ISSN: | 0004-637X 1538-4357 |
DOI: | 10.1088/0004-637X/757/2/160 |