Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh52a..03n&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH52A-03
Physics
7509 Corona
Scientific paper
The solar corona has a wide temperature range from less than 1MK (1,000,000K) to more than 10MK. The X-ray telescope (XRT) on board the Hinode satellite has 9 X-ray analysis filters with different temperature responses making it possible to detect both cool and hot coronal plasmas. Using the data observed with this telescope, we successfully derived the coronal temperature and emission measure around the whole sun, i.e., for not only active regions but also quiet regions and coronal holes. We also found that coronal structures are nicely classified using the temperature and emission measure. And the coronal structures were found to depend on the length of structure and the heating flux. Furthermore, we calculated the coronal potential magnetic field using the photospheric magnetic field. To compare the heating flux estimated with coronal temperature and the calculated coronal magnetic field might be the great clue to solving the big coronal heating question: why does the hot 1MK corona stably exist above the cool 6,000K solar surface? In this talk, we will show some results of our latest studies about the coronal thermal structures.
Kano Ryouhei
Narukage Noriyuki
Sakao Taro
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