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Title:
Observation of oscillations in coronal loops
Authors:
De Moortel, I.; Ireland, J.; Walsh, R. W.
Affiliation:
AA(University of St Andrews, School of Mathematical and Computational Sciences, North Haugh, St Andrews, Fife KY16 9SS, Scotland), AB(ESA at NASA Goddard Spaceflight Center, Room G-1, Building 26, Mail Code 682.3, Greenbelt, Maryland 20771, USA), AC(University of St Andrews, School of Mathematical and Computational Sciences, North Haugh, St Andrews, Fife KY16 9SS, Scotland)
Publication:
Astronomy and Astrophysics, v.355, p.L23-L26 (2000) (A&A Homepage)
Publication Date:
03/2000
Origin:
A&A
Astronomy Keywords:
MAGNETOHYDRODYNAMICS (MHD), SUN: ACTIVITY, SUN: CORONA, SUN: OSCILLATIONS
Bibliographic Code:
2000A&A...355L..23D

Abstract

On March 23rd 1999, a set of TRACE observations in the 171 Alfvén A (Fe Ix) bandpass was made of active region AR 8496. A wavelet analysis of a bright loop-footpoint to the south west of this active region displays outward propagating perturbations with periods 180-420 seconds at approximately 70-165 km s-1. We suggest that these oscillations are slow magneto-acoustic waves propagating along the loop, carrying an estimated energy flux of 4 x 102 ergs cm-2 s-1.

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