Propagating EUV disturbances in the Solar corona: Two-wavelength observations
UNSPECIFIED. (2003) Propagating EUV disturbances in the Solar corona: Two-wavelength observations. ASTRONOMY & ASTROPHYSICS, 404 (1). L1-L4. ISSN 0004-6361Full text not available from this repository.
Official URL: http://dx.doi.org/10.1051/0004-6361:20030763
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|
|Subjects:||Q Science > QB Astronomy|
|Journal or Publication Title:||ASTRONOMY & ASTROPHYSICS|
|Publisher:||E D P SCIENCES|
|Number of Pages:||4|
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