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CME Hot and Cold in XRT and TRACE 171A (movie)
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This eruptive event was seen on May 23, 2007, by both XRT (right)
and TRACE (left). TRACE
is a NASA SMEX mission that observes the solar transition
region and corona in UV and extreme UV wavelengths, with unmatched
resolution. (The data has been highly compressed to fit onto this
webpage, and does not accurately represent the achievable resolution
of either instrument.) The XRT image shows hot (above 2 MK) coronal
loops expanding and erupting from an active region towards the
lower-right corner of the image. The corresponding TRACE data at
171 Angstroms shows cooler material (approximately 0.7 to 2 MK)
ejecting in the same event, co-spatial with the hotter plasma. Also
striking in the TRACE data is the "emptying out" of the corona with
the eruption. Part of this is due to other loops swaying away from
the ejecta path, but also this indicates the passage of plasma that
is too hot to be seen in the 171 A passband, but which is viewable
in the XRT movie.
Keywords: CME, Temperature Structure, TRACE Filters: Ti_poly, TRACE/171 |
(prepared by A. Engell, L. Golub, and M. Weber)
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