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Propagating EUV disturbances in the Solar corona: Two-wavelength observations
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UNSPECIFIED (2003) Propagating EUV disturbances in the Solar corona: Two-wavelength observations. ASTRONOMY & ASTROPHYSICS, 404 (1). L1-L4. doi:10.1051/0004-6361:20030763 ISSN 0004-6361.
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Official URL: http://dx.doi.org/10.1051/0004-6361:20030763
Abstract
Quasi-periodic EUV disturbances simultaneously observed in 171 Angstrom and 195 Angstrom TRACE bandpasses propagating outwardly in a fan-like magnetic structure of a coronal active region are analysed. Time series of disturbances observed in the different bandpasses have a relatively high correlation coefficient (up to about 0.7). The correlation has a tendency to decrease with distance along the structure: this is consistent with an interpretation of the disturbances in terms of parallel-propagating slow magnetoacoustic waves. The wavelet analysis does not show a significant difference between waves observed in different bandpasses. Periodic patterns of two distinct periods: 2-3 min and 5-8 min are detected in both bandpasses, existing simultaneously and at the same distance along the loop, suggesting the nonlinear generation of the second harmonics.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Journal or Publication Title: | ASTRONOMY & ASTROPHYSICS | ||||
Publisher: | E D P SCIENCES | ||||
ISSN: | 0004-6361 | ||||
Official Date: | June 2003 | ||||
Dates: |
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Volume: | 404 | ||||
Number: | 1 | ||||
Number of Pages: | 4 | ||||
Page Range: | L1-L4 | ||||
DOI: | 10.1051/0004-6361:20030763 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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