Electron temperatures in the high-excitation zones of planetary nebulae

Details Electron temperatures in the high-excitation zones of planetary nebulae Electron temperatures in the high-excitation zones of planetary nebulae

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...341..901r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 341, June 15, 1989, p. 901-907.

Astronomy and Astrophysics

Astronomy

20

Electron Energy, Infrared Astronomy, Planetary Nebulae, Ultraviolet Astronomy, Fine Structure, Ground Truth, Iue, Spaceborne Astronomy

Scientific paper

Airborne infrared and ground-based UV observations of the forbidden Ne-V 24.3-micron and forbidden Ne-V 3426-A fine-structure lines of 17 planetary nebulae are discussed. Significantly higher Ne-V than O-IV temperatures are found for Hu 1-2 and NGC 2440, while IC 2165, NGC 6818, and NGC 7662 have similar Ne-V and O-IV temperatures. It is suggested that the Ne-V and O-IV temperature similarities may be due to the presence of large abundances of the dominant coolants (oxygen or neon) in the Ne-V zone.

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