Titlebook: Radio Stars; Proceedings of a Wor Robert M. Hjellming,David M. Gibson Conference proceedings 1985 D. Reidel Publishing Company, Dordrecht,

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Variations in the Radio Flux of the Hypergiant P Cygni (B1 Ia+)The radio flux of P Cygni is variable on a time scale of months or shorter. The variations are interpreted as variations in the degree of ionization of the wind due to the ejection of shells which shield the wind from the ionizing radiation of the star. The observed time scale agrees with the recombination time scale of the wind.

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Astrophysics and Space Science Libraryhttp://image.papertrans.cn/r/image/820650.jpg

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https://doi.org/10.1007/978-94-009-5420-5Accretion; astronomy; relativistic jet; stars; stellar

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several innovative information technologies and products have witnessed the changes of learning behaviors in recent years. Among them, how to use e-books to improve the learning performance of audience has become a promising research topic because it can be used to automatically record the reading

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