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Propagating EUV disturbances in the solar corona : two-wavelength observations
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King, D. B. (Damian Bryan), Nakariakov, V. M. (Valery M.), Deluca, E. E., Golub, L. (Leon) and McClements, K. G. (2003) Propagating EUV disturbances in the solar corona : two-wavelength observations. Astronomy & Astrophysics, Vol.404 (No.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 Å and 195 Å 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 | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Sun -- Corona, Magnetohydrodynamic waves, Solar oscillations, Sun -- Loop prominences | ||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||
| Publisher: | EDP Sciences | ||||
| ISSN: | 0004-6361 | ||||
| Official Date: | June 2003 | ||||
| Dates: |
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| Volume: | Vol.404 | ||||
| Number: | No.1 | ||||
| Page Range: | L1-L4 | ||||
| DOI: | 10.1051/0004-6361:20030763 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Funder: | Particle Physics and Astronomy Research Council (Great Britain) (PPARC), Great Britain. Dept. of Trade and Industry (DTI) |
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