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An observational study of a magneto-acoustic wave in the solar corona

Williams, DR; Mathioudakis, M; Gallagher, PT; Phillips, KJH; McAteer, RTJ; Keenan, FP; Rudawy, P; (2002) An observational study of a magneto-acoustic wave in the solar corona. Monthly Notices of the Royal Astronomical Society , 336 (3) 747 - 752. 10.1046/j.1365-8711.2002.05764.x. Green open access

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Abstract

The Solar Eclipse Corona Imaging System (SECIS) observed a strong 6-s oscillation in an active region coronal loop, during the 1999 August 11 total solar eclipse. In the present paper we show that this oscillation is associated with a fast-mode magneto-acoustic wave that travels through the loop apex with a velocity of 2100 km s−1. We use near-simultaneous SOHO observations to calculate the parameters of the loop and its surroundings such as density, temperature and their spatial variation. We find that the temporal evolution of the intensity is in agreement with the model of an impulsively generated, fast-mode wave.

Type: Article
Title: An observational study of a magneto-acoustic wave in the solar corona
Open access status: An open access version is available from UCL Discovery
DOI: 10.1046/j.1365-8711.2002.05764.x
Publisher version: http://dx.doi.org/10.1046/j.1365-8711.2002.05764.x
Language: English
Additional information: © 2002 RAS Definitive versions of articles pre-2013 are available at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966, now published by http://mnras.oxfordjournals.org
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/61113
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