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

D.R. Willams, Michail Mathioudakis, P.T. Gallagher, K.J.H. Phillips, R.T.J. McAteer, Francis Keenan, P. Rudawy, A.C. Katsiyannis

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)747-752
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Issue number3
Publication statusPublished - 01 Nov 2002

ASJC Scopus subject areas

  • Space and Planetary Science

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