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Astronomy · L5 · Galactic Chemical Evolution: Yields, Enrichment Timescales, and Gradients · flowchart

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by @openstemUpdated Astronomy
Star formation beginsin a gas cloudMassive stars explode quicklyas core-collapse SNeISM enriched promptlywith alpha-elements (O, Mg, Si…)New stars form fromthis alpha-enhanced gasTime passes:first white dwarfs form,binaries evolveType Ia supernovaebegin exploding (delayed)ISM enriched withiron-peak elements[α/Fe] declines as[Fe/H] continues rising —the chemical-clock \"knee\"

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