1984•The Astrophysical JournalOpen access

IRAS spectra of planetary nebulae

S. R. Pottasch, D. A. Beintema, E. Raimond, B. Baud, R. van Duinen, H. J. Habing, J. R. Houck, T. de Jong, R. E. Jennings, F. M. Olnon, P. R. Wesselius

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Abstract

Low-resolution spectra in the 7 - 23 μm range of five planetary nebulae observed with IRAS are presented and analyzed. The Ne III line at 15.5 μm is observed for the first time. This line is a sensitive indicator of electron temperature. The Ne III line and the S IV line at 11.5 μm dominate the short wavelengths in the spectra of the three observed medium-excitation nebulae.

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Key concepts: Physics, Planetary nebula, Astronomy, Spectral line, Astrophysics, Asymptotic giant branch, Astronomical spectroscopy, Stars