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| Paper: |
Coronal Rotation from XBPs Observed with Hinode/XRT |
| Volume: |
456, The Fifth Hinode Science Meeting |
| Page: |
207 |
| Authors: |
Kariyappa, R.; DeLuca, E. |
| Abstract: |
We have selected a large number of X-ray bright points (XBPs) over synoptic soft
X-ray full-disk images observed using Al-Mesh with X-Ray
Telescope (XRT) onboard the Hinode spacecraft during
July-December, 2008. We have analyzed the full-disk images
using SSW in IDL. We used the tracer method to identify and
trace the passage of XBPs over the solar disc with the help of
overlaying grids. We also obtained the position (Latitude and
Longitude), size & brightness information for XBPs using tracer
method as a function of time and thus calculated sidereal
angular rotation rate of corona at different latitudes. We
have compared the rotation rate with latitude, size and
brightness of XBPs. We found that the corona rotates differentially
and it appears that the larger XBPs show a
lower sidereal angular rotation rate, the smaller XBPs exhibit
higher rotation rate, similar to sunspots. |
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