Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..304c&link_type=abstract
Astrophysical Journal, Part 1, vol. 229, Apr. 1, 1979, p. 304-317.
Astronomy and Astrophysics
Astronomy
195
Auger Effect, B Stars, O Stars, Stellar Coronas, Stellar Winds, Supergiant Stars, X Ray Astronomy, Abundance, Ionizing Radiation, Line Spectra, Radiation Distribution, Runge-Kutta Method, Satellite Observation, Stellar Models, Stellar Spectra, Stellar Temperature
Scientific paper
Auger ionization by X-rays emanating from a thin coronal zone at the base of cool stellar winds may account for the strong O VI and N V lines in O stars and the C IV lines in B supergiants. This hypothesis is supported by the study of the corona size needed to produce the overall ionization conditions prevailing in Zeta Puppis. A coronal zone with a volume emission measure of 10 to the 58th power per cu cm and a temperature of five million deg K yields the required ionization. X-ray flux data from satellite observations also supports the hypothesis.
Cassinelli Joe P.
Olson Gordon L.
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