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Catalogue of the 1997 SOHO-EIT coronal transient waves and associated type II radio burst spectra

Thompson, B. J.; Mann, G.; Aurass, H. +1 more

We compare the coronal transient wave phenomenon discovered by SOHO extreme ultraviolet observations (``EIT waves'') with the associated radio signature of a coronal shock wave (type II burst). 90% of the type II bursts are associated with an EIT wave. On average, the speed derived from the radio burst is about three times larger than the EIT wave…

Atomic data from the IRON Project. XL. Electron impact excitation of the Fe XIV EUV transitions

Young, P. R.; Mason, H. E.; Storey, P. J.

We calculate collision strengths and thermally averaged collision strengths for electron excitation between the forty energetically lowest levels of Fe¹³⁺. The scattering calculation is more complete than any previous work on this ion and significant differences are found in the excitation rates for many of the extreme ultra-violet (EUV…

Location of the activity responsible for the appearance of coronal mass ejections and the sites of their ejection from the solar surface.

Shilova, N. S.

The white-light films of coronal mass ejections for April - May, 1998 (SOHO LASCO C2, C3), retrieved from Internet, are considered. The positions of active regions on visible and back sides of the Sun for each day are studied. It is shown that a region of large flare can be localized at a distance not less than the solar radius from the place wher…