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The effects of coronal regions on the X-ray flux and ionization conditions in the winds of OB supergiants and Of stars

1979; IOP Publishing; Volume: 229; Linguagem: Inglês

10.1086/156956

1538-4357

J. P. Cassinelli, G. L. Olson,

Astronomy and Astrophysical Research

view Abstract Citations (244) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The effects of coronal regions on the X-ray flux and ionization conditions in the winds of OB supergiants and Of stars. Cassinelli, J. P. ; Olson, G. L. Abstract 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. Publication: The Astrophysical Journal Pub Date: April 1979 DOI: 10.1086/156956 Bibcode: 1979ApJ...229..304C Keywords: 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; Astrophysics; Early-Type Supergiants:Metal Abundances; Early-Type Supergiants:Models; Early-Type Supergiants:Stellar Coronae; Early-Type Supergiants:Stellar Winds; Early-Type Supergiants:X-Ray Spectra full text sources ADS | data products SIMBAD (11)