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| Paper: |
Secretive Solar Waves Stimulate X-ray Bright Points |
| Volume: |
454, The 3rd Hinode Science Meeting |
| Page: |
395 |
| Authors: |
Saar, S. H.; Attrill, G. D. |
| Abstract: |
We discuss Hinode XRT observations of temporally-related emission
enhancements in solar X-ray bright points (XBPs) consistent with
excitation by an otherwise unseen wave. In one case, the wave
source is unclear (out of the field of view), in the other which we report here, the wave seems to
be excited by a flaring/erupting XBP. In this latter case, the wave
velocity averaged ∼340 km s-1 in areas of quiet Sun emission, but was
reduced by ∼1/3 in areas of higher emission and magnetic flux
density. Larger loops were mostly unaffected by the wave's passage,
while XBPs could still be excited at distances of 105 km and more
from the apparent origin. Small coronal dimming regions (displaying
characteristic evolution properties in EUV intensity) are seen next
to the flaring XBP, suggesting a small CME may have been associated
with the event. We speculate on the origin and properties of these
mysterious waves, which may prove useful tools for studying the
media through which they travel.
These events are inconspicuous, showing low intensity enhancements
of only selected small regions, and require high cadence, high
spatial resolution data to be detected. Since they are easily overlooked and/or
confused with stochastic variability, these waves may be a fairly
common, but under-recognized component of the flare/CME phenomenon
at small energies and spatial scales. SDO's AIA should be very
useful in further study of these waves. |
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