Computer Science – Databases
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985lastr..99..505l&link_type=abstract
L'Astronomie (ISSN 0004-6302), vol. 99, Nov. 1985, p. 505-511. In French.
Computer Science
Databases
Solar Corona, Solar Instruments, Radio Telescopes, Skylab Program, Solar Temperature, Solar X-Rays, Spectroheliographs
Scientific paper
A short history is presented of the evolution of the instrumentation and theoretical understanding of the composition and dynamics of the solar corona. Modern analytical tools for modeling coronal phenomena were developed using databases accumulated with instrumentation on board Skylab. However, the short duration of the Skylab program did not allow long term studies, e.g., of the 11 yr solar cycle. Ground-based spectroheliography using instruments such as the radiotelescopes at Culgoora, Nancay and Clark Lake, as well as the VLA, furnish high resolution long-term data. It is thus far known that the corona is in excess of a million degrees Centigrade and is composed of plasma and free electrons. The radio observations have revealed a density gradient. Absorption regions have at meter wavelengths identified the chromospheric-corona transition zone. Finally, the characteristics of solar phenomena which give rise to radio and X ray bursts are discussed.
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