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[15.10] Simultaneous SUMER and TRACE Observations of Supra-arcade Downflows and Oscillations

D.E. McKenzie (Montana State University), D.E. Innes, T. Wang (Max-Planck-Institut fur Aeronomie)

The 21 April 2002 X-class solar flare exhibited supra-arcade downflows of the type described by McKenzie and Hudson (1999). The flare was observed simultaneously by several observatories, and the downflows were clearly imaged by TRACE and SOHO/SUMER. We present a comparison of the TRACE and SUMER data concerning the supra-arcade downflows, and demonstrate that the dark downflow features are consistent with regions of locally depressed plasma density. Furthermore, the implications of the oscillatory behavior of the supra-arcade spikes for coronal seismology will be considered.

We gratefully acknowledge support from NASA, DARA, CNES, and ESA.

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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.