Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh51a1262w&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SH51A-1262
Astronomy and Astrophysics
Astrophysics
[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7519] Solar Physics, Astrophysics, And Astronomy / Flares, [7537] Solar Physics, Astrophysics, And Astronomy / Solar And Stellar Variability, [7549] Solar Physics, Astrophysics, And Astronomy / Ultraviolet Emissions
Scientific paper
Ne-sequence iron ions, FeXVII, are formed around the temperature of log Te ~ 6.7, which nearly correspond to the maximum temperature reached in solar active regions. The EIS instrument on board the Hinode mission has detected several week FeXVII emission lines appearing in its observing wavelengths (170 - 210 A, 250 - 290 A), and they are identified as those from the transitions between 2p^5 3s/3p - 2p^5 3p/3d. The observed line intensity ratios among them are compared with the theoretical calculations that are unable to tell their line wavelengths themselves. We found that many of them except the 280.2 A line are blended by lower-temperature week coronal lines, and that the photon branching ratio of the 2p^5 3p ^3S_0 level to the 2p^5 3s levels is wrong by a factor of 2, roughly.
Kato Daisuke
Murakami Iwanori
Sakaue Hiroyuki A.
Watanabe Ta.
Yamamoto Norimasa
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