Recombination lines in planetary nebulae at 15 gigahertz

Details Recombination lines in planetary nebulae at 15 gigahertz Recombination lines in planetary nebulae at 15 gigahertz

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...193..687b&link_type=abstract

Astrophysical Journal, vol. 193, Nov. 1, 1974, pt. 1, p. 687-692.

Astronomy and Astrophysics

Astronomy

17

H Alpha Line, Microwave Emission, Planetary Nebulae, Radiative Recombination, Radio Astronomy, Radio Spectra, Abundance, Density Distribution, Electron Density (Concentration), Ionized Gases, Least Squares Method, Radiant Flux Density, Spectral Energy Distribution, Temperature Gradients

Scientific paper

The H 76 alpha radio recombination line is detected in three out of seven planetary nebulae. From these observations it is suggested that spatial variations of both temperature and density may be responsible for the observed line strengths. More sophisticated models of radio emission are required to establish the very high electron densities which have previously been implied from radio recombination-line observations.

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