OSO-7 results on coronal emission near 304 A

Details OSO-7 results on coronal emission near 304 A OSO-7 results on coronal emission near 304 A

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...43..337n&link_type=abstract

Solar Physics, vol. 43, Aug. 1975, p. 337-350.

Astronomy and Astrophysics

Astronomy

4

Oso-7, Solar Corona, Spatial Distribution, Ultraviolet Spectra, Chemical Composition, Line Spectra, Lyman Alpha Radiation, Molecular Collisions, Molecular Excitation, Solar Spectra, Spaceborne Astronomy, Spectroheliographs, Spectrum Analysis

Scientific paper

The spectral composition and spatial distribution of equatorial coronal emission near 304 A is examined. Spectral scans indicate that the predominant line is from Si XI. Comparisons of observations with calculations of intensity changes with altitude indicate that collisional excitation is important near the sun but that photoexcitation becomes dominant beyond about 1.3 solar radii from the solar center. Observed and calculated intensities are in approximate agreement for abundances and electron densities that are within the range of observed values.

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