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Galaxies and Cosmology

Galaxies and Cosmology. Key figures in relativistic cosmology Friedman de Sitter Einstein Lemaitre. General Relativity. The Galaxy. The Galaxy. Distances. SMC by Fred Espenak. The Expanding Universe. The Expanding Universe. Hubble and Humason, 1931.

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Galaxies and Cosmology

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  1. Galaxies and Cosmology Key figures in relativistic cosmology Friedman de Sitter Einstein Lemaitre

  2. General Relativity

  3. The Galaxy

  4. The Galaxy

  5. Distances SMC by Fred Espenak

  6. The Expanding Universe

  7. The Expanding Universe Hubble and Humason, 1931

  8. The Steady State

  9. The Less Rapidly Expanding Universe... part 1 MB = -4.35 log P + 3.98 MB = -1.33 log P + 0.24 W Vir stars (Type II Cepheids) – magnitude of about -1 at log P = 1 m – M = 5 log(d/10) If ΔM = 2, d changes by factor of 102/5 = 2.5 Classical (Type I) Cepheids – magnitude of about -3 at log P = 1 MB = -2.59 log P - 0.67

  10. The Less Rapidly Expanding Universe... part 2 red plate; H II regions marked blue plate; star marked Allan Sandage, ApJ127 (1958) 123

  11. Hubble’s (not-very) Constant Sandage recognises HII regions (not stars) Jan Oort Baade discovers Pop II

  12. Radio Source Counts

  13. Cosmic Background Herman – Gamow – Alpher Wilson Penzias Wilkinson Peebles Dicke

  14. Cosmic Background Boynton, Stokes & Wilkinson, 1968 COBE satellite, 1990

  15. Big Bang Nucleosynthesis Wagoner, Fowler and Hoyle (1967)

  16. Hubble Wars Gerard de Vaucouleurs Allan Sandage

  17. Hubble Peace?

  18. Hubble Peace?

  19. Inflation

  20. CMB Anisotropies David Spergel

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