AST 1002 Chapter 12 - During star formation (Chapter 11) we...

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1On the Main Sequence, thecontraction stops becausegravity and internal pressureexactly balance each other.Nuclear reactions occur atexactly the right rate tobalance gravity.During star formation (Chapter 11) we talked about Protostars.These objects radiate energy away in the form of light.Thatenergy comes from gravity – released by contraction.A stars’ massdeterminesits luminosityComposition of a Sun-like star.
What happens whenthe core Hydrogen isused up?
What happens in the core asit continues to contract andget hotter?C.
2
3Post-Main Sequence evolutionThe Helium Flash:•After the core reaches 108K(stage9), Helium “ignites” to make Carbon.•The onset of this burning causes the

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Term
Spring
Professor
Dr.HaywoodSmith,Jr
Tags
Stellar Evolution, White dwarf

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