Sun : corona;
Sun : oscillations;
Sun : transition region;
Sun : UV radiation;
waves;
D O I:
10.1051/0004-6361:20030709
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
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 Angstrom 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 approximate to300 s. This period is also observed with CDS suggesting propagating oscillations at chromospheric, transition region and coronal temperatures in the He I, O V and Mg IX lines.