UNSPECIFIED. (2003) Propagating EUV disturbances in the Solar corona: Two-wavelength observations. ASTRONOMY & ASTROPHYSICS, 404 (1). L1-L4. ISSN 0004-6361

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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
Subjects:	Q Science > QB Astronomy
Journal or Publication Title:	ASTRONOMY & ASTROPHYSICS
Publisher:	E D P SCIENCES
ISSN:	0004-6361
Date:	June 2003
Volume:	404
Number:	1
Number of Pages:	4
Page Range:	L1-L4
Identification Number:	10.1051/0004-6361:20030763
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/9702

Data sourced from Thomson Reuters' Web of Knowledge

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