Image:Evolved star fusion shells.png

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Description

This diagram shows a simplified cross-section of a massive, evolved star (with a mass greater than eight times the Sun.) Where the pressure and temperature permit, concentric shells of Hydrogen (H), Helium (He), Carbon (C), Neon/Magnesium (Ne), Oxygen (O) and Silicon (Si) plasma are burning inside the star. (Not to scale.) The resulting fusion by-products rain down upon the next lower layer, building up the shell below. As a result of Silicon fusion, an inert core of Iron (Fe) plasma is steadily building up at the center. Once this core reaches the Chandrasekhar mass, the iron can no longer sustain its own mass and it undergoes a collapse. This can result in a supernova explosion.
Source

Contributor
Date

December 18, 2006
Author

R. J. Hall
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(Reusing this image)

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Other versions

One SVG version presuming a red giant about to cataclysmify

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I, the copyright holder of this work, hereby publish it under the following licenses:
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Date/TimeDimensionsUserComment
current10:03, 24 January 2007499×499 (87 KB)Pngbot (optimized with optipng)
16:25, 18 December 2006499×499 (105 KB)RJHall (The onion-like layars of a massive, evolved star just prior to core collapse.)
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