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| Paper: |
Cooler and Hotter X-ray Bright Points from Hinode/XRT Observations |
| Volume: |
454, The 3rd Hinode Science Meeting |
| Page: |
149 |
| Authors: |
Kariyappa, R.; DeLuca, E. E.; Saar, S. H.; Golub, L.; Damé, L.; Varghese, B. A. |
| Abstract: |
We use a 7-hour (17:00 UT - 24:00 UT) time sequence of soft X-ray images observed
almost simultaneously in two filters (Ti_poly and Al_mesh) on April 14, 2007
with X-Ray Telescope (XRT) on-board the Hinode mission to determine the temperature of X-ray bright
points (XBPs). A sample of 14 XBPs and 2 background coronal regions have been identified and selected
on both the images for detailed analysis.
The
temperature of XBPs is determined by filter ratio method. We find that
the XBPs show
temperature fluctuations and that the average temperature ranges from 1.1 MK to 3.4 MK which may correspond to
different X-ray fluxes. These results suggest the existence of cooler and hotter XBPs and that the heating rate
of XBPs is highly variable on short time scales. |
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