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Flare-generated coronal loop oscillations: A tool for MHD coronal seismology
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UNSPECIFIED (2000) Flare-generated coronal loop oscillations: A tool for MHD coronal seismology. In: International Workshop on Waves in Dusty, Solar, and Space Plasmas, MAY 22-26, 2000, LEUVEN, BELGIUM.
Full text not available from this repository.Abstract
Quasi-periodical oscillations of positions of coronal loops were observed in the extreme- ultraviolet band (171A, FeIX) with the imaging telescope onboard the TRACE spacecraft. Oscillating transversal displacements (swinging) of a long (similar to 130 Mm) thin (diameter similar to2 Mm) bright loop, were detected. The oscillations were excited by a flare (14th July 1998 at about 12:55 UT) at distance of about 60 Mm from the loop. The frequency of the oscillations was about 4 mHz (the period about 265 s) and was determined by the wavelet analysis. Neighbouring perpendicular slits show synphase temporal behaviour, suggesting that the oscillations are produced by a Link global fast magnetoacoustic mode of the loop. With this interpretation, we determine the kink speed in the loop as 1040 km/s, which gives the Alfven speed of about 770+/-40 km/s. The detection and analysis of post-flare oscillations of coronal loops provides us with an efficient tool for indirect determination of coronal parameters, e.g. the magnetic field found to be of about 20 G.
| Item Type: | Conference Item (UNSPECIFIED) |
|---|---|
| Subjects: | Q Science > QC Physics |
| Series Name: | AIP CONFERENCE PROCEEDINGS |
| Journal or Publication Title: | WAVES IN DUSTY, SOLAR, AND SPACE PLASMAS |
| Publisher: | AMER INST PHYSICS |
| ISBN: | 1-56396-962-9 |
| ISSN: | 0094-243X |
| Editor: | Verheest, F and Goossens, M and Hellberg, MA and Bharuthram, R |
| Date: | 2000 |
| Volume: | 537 |
| Number of Pages: | 7 |
| Page Range: | pp. 264-270 |
| Publication Status: | Published |
| Title of Event: | International Workshop on Waves in Dusty, Solar, and Space Plasmas |
| Location of Event: | LEUVEN, BELGIUM |
| Date(s) of Event: | MAY 22-26, 2000 |
| URI: | http://wrap.warwick.ac.uk/id/eprint/12650 |
Data sourced from Thomson Reuters' Web of Knowledge
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