Detection of coronal holes from 5303-A-wavelength Fe XIV observations

Details Detection of coronal holes from 5303-A-wavelength Fe XIV observations Detection of coronal holes from 5303-A-wavelength Fe XIV observations

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...195..801f&link_type=abstract

Astrophysical Journal, vol. 195, Feb. 1, 1975, pt. 1, p. 801-803.

Astronomy and Astrophysics

Astronomy

20

Coronagraphs, Emissivity, Iron, Line Spectra, Solar Corona, Solar Spectra, Electron Density (Concentration), Electrophotometry, Luminous Intensity, Spaceborne Astronomy

Scientific paper

Photoelectric measurements of intensity are used to estimate the distribution of volume emissivity in the coronal green line over the solar surface. Using this distribution and a calculated dependence of emissivity as a function of temperature and electron density, it is possible to estimate a coronal density distribution. An example is given which shows a region of drastically reduced emissivity - a coronal hole - which was simultaneously detected by spacecraft.

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