Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240...99b&link_type=abstract
Astrophysical Journal, Part 1, vol. 240, Aug. 15, 1980, p. 99-104.
Astronomy and Astrophysics
Astrophysics
59
Argon, Gas Ionization, Line Spectra, Planetary Nebulae, Spectral Energy Distribution, Sulfur, Abundance, Gas Density, Gas Temperature, Image Dissector Tubes, Stellar Mass, Tables (Data), Telescopes, Wavelengths
Scientific paper
Measurements of line intensities in the Ring Nebula have been made in four of the six positions observed by Hawley and Miller over a wider wavelength range. The conclusions of Hawley and Miller about the physical conditions and ionization of He, O, Ne, and N are generally confirmed. New observations of S and Ar line intensities have been made, and new ionization correction formulae for these elements are examined.
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