IRAS spectra of planetary nebulae

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Spectroscopy, Infrared Astronomy, Planetary Nebulae, Spaceborne Astronomy, Astronomical Catalogs, Infrared Astronomy Satellite, Line Spectra, Neon

Scientific paper

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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