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Дата изменения: Fri Jan 25 15:33:06 2002
Дата индексирования: Tue Oct 2 09:46:30 2012
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Wolf-Rayet stars and hydrogen-deficient binaries

The Galaxy hosts a variety of other extraordinary stars with little or no surface hydrogen. Most are rare, but nevertheless intriguing. Massive Wolf-Rayet stars are young (Population I) hydrogen-deficient stars ([Hamann 1996]), as are binary systems such as $\upsilon$ Sgr ([Jeffery 1996]).