Letter to the Editor

Joint observations of propagating oscillations with SOHO/CDS and TRACE

¹ Centre for Astrophysics, University of Central Lancashire, Preston, PR1 2HE, England
² School of Mathematics and Statistics, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, Scotland
³ L3 Communications EER Systems Inc., NASA GSFC, Code 682.3, Bldg. 26, Greenbelt, MD 20771, USA

Corresponding author: M. S. Marsh, mmarsh@uclan.ac.uk

Received: 18 March 2003
Accepted: 12 May 2003

Abstract

Joint Observing Program (JOP) 83 Solar and Heliospheric Observatory/Coronal Diagnostic Spectrometer (SOHO/CDS) and Transition Region and Coronal Explorer (TRACE) data is analysed for evidence of propagating intensity oscillations along loop structures in the solar corona. A propagating intensity oscillation with a minimum estimated speed of 50–195 km s^-1 is observed within a TRACE 171 Å coronal loop using a running difference method. Co-spatial and co-temporal CDS and TRACE observations of this loop are analysed using a wavelet analysis method. The TRACE data shows a propagating oscillation with a period of ≈300 s. This period is also observed with CDS suggesting propagating oscillations at chromospheric, transition region and coronal temperatures in the , and lines.