A study of the physical conditions in planetary nebulae

Details A study of the physical conditions in planetary nebulae A study of the physical conditions in planetary nebulae

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986azh....63.1126g&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 63, Nov.-Dec. 1986, p. 1126-1137. In Russian.

Astronomy and Astrophysics

Astrophysics

Astrophysics, Interstellar Gas, Planetary Nebulae, Gas Composition, Helium Ions, Hydrogen Atoms, Photoionization, Positive Ions

Scientific paper

Methods for the determination of the physical parameters of planetary nebulae are analyzed using modeled nebula emission spectra, hydrogen atom density, and optical width in the Lyman continuum. For highly excited nebulae, the most reliable method for the determination of the stellar temperature is the method of relative ionization proposed by Pronik (1957, 1962) which is based on the comparison of oxygen and sulfur line intensities in nebulae with different exciting star temperatures. A method for the determination of the chemical composition of a nebular gas is also discussed.

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