Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..56..385v&link_type=abstract
Astrophysics and Space Science, vol. 56, no. 2, July 1978, p. 385-388. Research supported by the National Research Council of C
Astronomy and Astrophysics
Astrophysics
1
Electron Density (Concentration), Emission Spectra, Hot Stars, Stellar Spectra, Wolf-Rayet Stars, Line Spectra, Stellar Atmospheres
Scientific paper
A generalization is presented of the Inglis-Teller (1939) relation for a hydrogenlike or alkalilike ion with an arbitrary change of the core immersed in a plasma which is a mixture of ions of various charges and electrons. This relation is used to estimate the electron density in the emission-line region of Wolf-Rayet stars from observational data on He II and C IV emission in the spectrum of the WC7 star HD 192103. The results obtained from the He II lines and from the C IV lines are found to yield substantially different estimates for the electron density in the emission-line region. Reasons for the discrepancy are considered, and it is concluded that the electron density in the region which gives rise to He II lines in Wolf-Rayet stars is approximately 4 x 10 to the 14th power per cu cm.
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