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Models of the quiet and active solar atmosphere from Harvard OSO data.Review of some Harvard Observatory programs aimed at defining the physical conditions in quiet and active solar regions on the basis of data obtained from the OSO-IV and OSO-VI spacecraft. The spectral range covered is from 300 A to 1400 A. This spectral range consists of emission lines and continua from abundant elements such as hydrogen, helium, carbon, nitrogen, oxygen, silicon, magnesium, aluminum, neon, iron, and calcium in various ionization states ranging from neutral to 15 times ionized. The structure is discussed of the quiet solar atmosphere as deduced from center-to-limb behavior of spectral lines and continua formed in the chromosphere and corona. In reviewing investigations of solar active regions, it is shown that the structure of these regions varies in a complicated manner from point to point. The local structure is influenced by factors such as the magnetic field configuration within the active region and the age or evolutionary state of the region.
Document ID
19720029549
Document Type
Conference Proceedings
Authors
Noyes, R. W. (Smithsonian Astrophysical Observatory and Harvard College Observatory Cambridge, Mass., United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1971
Subject Category
SPACE SCIENCES
Meeting Information
Physics of the solar corona; NATO, Advanced Study Institute(Athens)
Funding Number(s)
CONTRACT_GRANT: NAS5-9274
CONTRACT_GRANT: NASW-184
Distribution Limits
Public
Copyright
Other