No CrossRef data available.
Published online by Cambridge University Press: 25 May 2016
(Monthly Notices Roy. Astron. Soc.). Rocket observations of the EUV solar spectrum obtained during the total eclipse of 7 March 1970 showed the presence of a large coronal condensation on the NE limb (Gabriel et al., 1971). The condensation shows the existence of loop structure, which defines the local magnetic fields, and is apparent in forbidden lines including those of Si viii, Si ix, S xi, Fe ix, Fe xi and Fe xii which lie between 1200 Å and 2050 Å (Jordan, 1971). These lines are formed in the temperature range 9.3 × 105K to 2.0 × 106K. The photographic observations of the active region show clearly that the spatial distribution of material varies considerably with its temperature.