Long-lived hot coronal structures observed with CORONAS-F/SPIRIT in the Mg XII line

@article{Grechnev2006LonglivedHC,
  title={Long-lived hot coronal structures observed with CORONAS-F/SPIRIT in the Mg XII line},
  author={V. V. Grechnev and Sergey V. Kuzin and A. M. Urnov and Igor A. Zhitnik and Arkadiy M. Uralov and S. A. Bogachev and Moissei Livshits and O. I. Bugaenko and Vasiliy G. Zandanov and A. P. Ignat’ev and Viktor V. Krutov and S. N. Oparin and Andrei A. Pertsov and Vladimir Slemzin and I. M. Chertok and Alexandr I. Stepanov},
  journal={Solar System Research},
  year={2006},
  volume={40},
  pages={286-293}
}
Large-scale hot features were detected and observed several times high in the solar corona in the high-temperature Mg XII line (T = 5–20 MK, Tmax = 10 MK) with the soft X-ray telescope of the SPIRIT instrumentation complex onboard the CORONAS-F spacecraft. These features look like a spider up to 300000 km in size and live up to a few days. Their bright cores observed at heights were from 0.1 to 0.3 solar radii are connected with active regions by darker legs, giant loops. These features are… 
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References

SHOWING 1-10 OF 34 REFERENCES
Plasma Parameters in a Post-Eruptive Arcade Observed with CORONAS-F/SPIRIT, Yohkoh/SXT, SOHO/EIT, and in Microwaves
The SPectroheliographIc X-Ray Imaging Telescope (SPIRIT) aboard the CORONAS-F spacecraft sometimes observes in the Mg XII 8.42 u A line (Tmax ∼ 9MK) large, bright features existing for many hours
Analysis of a solar eruptive event on November 4, 2001, using CORONAS-F/SPIRIT data
We analyze large-scale solar activity following the eruption of a very powerful, geoeffective coronal mass ejection in the 23rd solar cycle, observed at 175, 284, and 304 Å on November 4, 2001, using
Common features in the development of powerful long-duration solar X-ray flares
We have begun an investigation of the possible origins of considerable of powerful solar flares. This effect is manifest, first and foremost, in the existence of high-temperature plasma in flare
Dynamic 10 MK plasma structures observed in monochromatic full‐Sun images by the SPIRIT spectroheliograph on the CORONAS‐F mission
High-resolution temporal series of monochromatic full-Sun images in the L Mg xii emission line at 8.42 A have been obtained by the SPectroheliographIc X-Ray Imaging Telescope (SPIRIT)
The Electron Temperature and Fine Structure of Soft X-Ray Solar Flares
I discuss the determination of the electron temperature of soft X-ray solar flares using data obtained from the iron-line Bragg Crystal Spectrometer (BCS) and Soft X-ray Telescope (SXT) instruments
Solar flares with long soft X-ray decays: Energy balance in giant loops
Solar flares with long X-ray decays (Long-Decay Flars, LDF) are studied. X-ray and radio observations can be used to trace the active phase of an LDF and the subsequent development of a system of
Observations of a Post-Eruptive Arcade on October 22, 2001 with CORONAS-F, other Spaceborne Telescopes, and in Microwaves
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)
High-Beta Disruption in the Solar Atmosphere
The outer layers of X-ray loops in solar flares are known to be more active: they are hotter than the lower loops and above the loop-top hard X-ray sources are formed there. These phenomena are
The spectrum of coronal sources at millimetre and centimetre waves
Recently recognized solar millimetre-wave off-limb sources are interpreted as a special phenomenon of long-duration post- and inter-flare emission at coronal altitudes. We present, for the first
...
...