After a star completes the oxygen burning process, its core is composed primarily of silicon and sulfur.
2.
In massive stars, heavier elements can also be burned in a contracting core through the neon burning process and oxygen burning process.
3.
The convectively-burning flame then results from both neon and oxygen burning as it advances towards the core, while the oxygen-burning shell continuously shrinks in mass.
4.
Near 2?0 9 K, the oxygen burning reaction rate is approximately 2.8?0 " 12 ( T 9 / 2 ) 33, where T 9 is the temperature in billions of degrees Kelvin.
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