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

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

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mnras.336..747w&link_type=abstract

Monthly Notice of the Royal Astronomical Society, Volume 336, Issue 3, pp. 747-752.

Astronomy and Astrophysics

Astronomy

45

Mhd, Waves, Eclipses, Sun: Activity, Sun: Corona, Sun: Oscillations

Scientific paper

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.

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