100+ Population ii stars PowerPoint (PPT) Presentations, Population ii stars PPTs

Population ii stars - PowerPoint PPT Presentation

The Milky Way

The Milky Way. Astronomy 112 Chapter 20. Mapping our galaxy. Determining distances Difficult because of dust Blocks light Dims light Reddens light Any distance requires something with a known luminosity Standard candle. Measuring distances. Direct measurement

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396 views • 29 slides

Chemical evolution

Chemical evolution. Finished last time by saying that all elements heavier than hydrogen and helium were formed in stars. The younger a star, the more material from previous generations of stars it will contain, and the higher their metallicity .

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433 views • 22 slides

Abstract

Abstract. All simulations present common trends. Metal enrichment is very patchy, with rare, unpolluted regions surviving at all redshifts, inducing the simultaneous presence of metal-free and metal-rich star formation regimes.

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213 views • 20 slides

Lec 8

Lec 8. II-9 Normal Galaxies and Clusters of Galaxies (Main Ref.: Lecture notes; FK 19-5, 23-1 to 3, 5, 6; Box 23-1; CD photos shown in class) Stellar Population (Main Ref.: Lecture notes; FK Sec. 19-5 ) Two kinds of populations:

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106 views • 9 slides

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Population ii stars - PowerPoint PPT Presentation

The Milky Way

Chemical evolution

Abstract

Lec 8