Observations of a Post-Eruptive Arcade on October 22, 2001 with CORONAS-F, other Spaceborne Telescopes, and in Microwaves

V.N. Borovik, V.V. Grechnev, O.I. Bugaenko, S.A. Bogachev, I.Y. Grigorieva, S.V. Kuzin, S.V. Lesovoi, M.A. Livshits, A.A. Pertsov, G.V. Rudenko, V.A. Slemzin, A.I. Stepanov (+4 others)
2004 Proceedings of the International Astronomical Union  
Using multi-spectral data, we estimate plasma parameters in the post-eruptive arcade observed on October 22, 2001 at 100 Mm above the limb: the temperature is 6 MK and the plasma density is (5 − 9) • 10 9 cm −3 . We state a problem of the long-term equilibrium of the hot top of the arcade high in the corona: either the magnetic field surrounding the arcade well exceeds that one extrapolated in the potential approximation, or β > 1 both inside and outside the arcade. A downflow observed in soft
more » ... w observed in soft X-rays can contribute to the equilibrium.
doi:10.1017/s1743921305000220 fatcat:qeontzsyozehvn3mjkfthpyivq