The analysis of a hot loop oscillation event using SOHO/SUMER, GOES/SXI, and RHESSI observations is presented. Damped Doppler shift oscillations were detected in the Fe XIX line by SUMER, and interpreted as a fundamental standing slow mode. The evolution of soft X-ray emission from GOES/SXI and hard X-ray sources from RHESSI suggests that the oscillations of a large loop are triggered by a small flare, which may be produced by interaction (local reconnection) of this large loop with a small loop at its footpoint. This study provides clear evidence supporting our early conjecture that the slow-mode standing waves in hot coronal loops are excited by impulsive heating (small or microflares) at the loop's footpoint.
@article{arxiv.1706.05427,
title = {Slow-Mode Oscillations of Hot Loops Excited at Flaring Footpoints},
author = {Tongjiang Wang and Wei Liu and Leon Ofman and Joseph M. Davila},
journal= {arXiv preprint arXiv:1706.05427},
year = {2017}
}
Comments
2 pages, 1 figure, Published in Proceedings of Hinode 5th science meeting