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WHERE IS FLUORINE? By: Ann Dyer, Samantha Sullivan, and Isaac Richter About Fluorine • The most reactive element on the periodic table. • Explodes with hydrogen. • Only one stable isotope: F-19 • Used for etching glass and atomic bombs (UF6) Maintle Wolf-Rayet Stars • 1st spectral line studies by G. Rayet & C. Wolf • Hot, bright, and large (~20 solar masses) • Form from massive Otype MS stars • Strange composition: more He than H • Super gigantic winds! • Mass loss C IV N III He I Main Sequence Stars • Fusion: hydrogen to helium • Produce fantastic energy • Energy released during fusion pushes on stellar material (radiation pressure) and balances gravity • Stars spend 90% of lifetime as a MS star • The more massive a star is, the less time it spends as a MS star • Stars with mass < .08 solar masses never become MS stars (brown dwarf stars) HI He I So, where's the fluorine? Wolf-Rayet vs. Main Sequence • Very turbulent • Monster stellar winds! • Lower than normal hydrogen levels • Short lifespan • Very rare • Stable • Holy hydrogen! • 90% of lifetime spent as a main sequence star • Numerous 7037 Fluorine Why there, fluorine? Fluorine can exist in Wolf-Rayet stars because it is ejected so quickly in the winds that it can escape the other elements.
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