Phys 231, Topic 4: Stellar Evolution 1

Physics 231: Section 4Stellar Evolution

http://mimas.physics.drexel.edu/phys231

Phys 231, Topic 4: Stellar Evolution 2

The Milky Way at 21 cm

Map of neutral hydrogen (e.g. H I Clouds).

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Molecular CloudsThe Horsehead (IC434) Nebula, part of the Orion complex. Note that these are most easily seen as absorption.

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H II RegionsM8, the “Lagoon Nebula.”

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The formation of the sun

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The Orion Nebula

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Evolution of the Sun

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The Structure of a Red Giant

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Horizontal Branch Star

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Asymptotic Giant Branch Star

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The Planetary Nebula NGC 6720

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Liouville’s Theorem

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Evolution of high mass stars

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The “onion-skin” model

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Supernova 1987ABefore After

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Pulsars