Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542205s&link_type=abstract
American Astronomical Society, AAS Meeting #215, #422.05; Bulletin of the American Astronomical Society, Vol. 42, p.292
Other
Scientific paper
We report on Hinode XRT observations of sequential emission enhancements in solar X-ray bright points (XBPs) consistent with excitation by an (otherwise undetected) wave. In one case, the wave appears to have been excited by a flaring/erupting XBP. The wave velocity averaged about 350 km/s in areas of weak magnetic field and quiet Sun emission, but was reduced by about 1/3 in areas of higher magnetic flux density. Larger loops were mostly unaffected by the wave disturbance, which could still excite XBPs at distances of 4e5 km and more from their apparent starting point. We speculate on the origin and properties of these mystery waves, which may be useful as diagnostics of the medium in which they travel. We suspect these waves may be relatively common, but heretofore under-recognized due to their low level, enhancement selectivity, need for high cadence data, and confusion from stochastic variability. SDO's AIA should aid considerably in further study of this intriguing phenomenon.
This work was supported by NASA contract NNM07AB07C to SAO.
Attrill Gemma D. R.
Saar Steven H.
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