8-13 micron spectra of NGC 7027, BD +30 3639 and NGC 6572.

Abstract

Observations of the 8-1 3-it spectra of the planetary nebulae NGC 7027, BD + 30'3639, and NGC 6572 are presented. The spectra consist of both fine-structure line radiation and continuum radiation. The results are discussed in terms of abundances, predicted line strengths, and composition of radiating material. Subject headings: abundances, nebular - planetary nebulae - spectra, infrared