The ionization structure of planetary nebulae. X - NGC 2392

Details The ionization structure of planetary nebulae. X - NGC 2392 The ionization structure of planetary nebulae. X - NGC 2392

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...371..217b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 371, April 10, 1991, p. 217-225. Previously announced in STAR as N90-29274.

Other

26

Abundance, Emission Spectra, Interstellar Chemistry, Ionization, Planetary Nebulae, Ultraviolet Spectra, Electron Energy, Interstellar Extinction, Iue, Ultraviolet Spectrophotometers

Scientific paper

Spectrophotometric observations of emission-line intensities over the spectral range 1400 to 7200 A were made in six positions in the planetary nebula NGC 2392. Standard equations used to correct for the existence of elements in other than the optically observable ionization stages give consistent results for the different positions that are in excellent agreement with abundances calculated using ultraviolet lines, and there is no evidence for any abundance gradient in the nebula. The logarithmic abundances agree well with determinations by Aller and Keyes.

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