Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pazh...13..589g&link_type=abstract
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 13, July 1987, p. 589-596. In Russian. In Russian. In Russian.
Astronomy and Astrophysics
Astronomy
1
Lyman Spectra, Planetary Nebulae, Emission Spectra, Energy Distribution, Stellar Cores
Scientific paper
The energy distribution in the spectra of the nuclei of 29 planetary nebulae beyond the Lyman limit is calculated from the observed intensities of the He II 4686 A and H-beta lines. The energy balance and Zanstra equations are used and modified in the case of a helium admixture. The emission jump discovered in the radiation of some nuclei at 228 A is analyzed. It is concluded that the energy distribution in the emission spectrum of the nuclei of the planetary nebulae at lambda less than 912 A can be used as a first approximation in the construction of photoionization models of the luminescence of these objects.
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