1. Cosmology Lecture 10 The early universe

2. Our benchmark universe (  CDM) H 0 = 72 km s -1 Mpc -1  0 = 1 - spatially flat   = 0.73  m = 0.27  m,baryon = 0.04  m,cold-dark-matter = 0.23  r = 10 -4 Age of universe = 13.7 Gyr What is dark matter? What is dark energy? Does model hold in very young universe? How does structure form?

4. Matter dominated

6. Quantum fluctuations Galaxy clusters Inflation

7. Old horizon New horizon Inflation and the horizon problem Thermal equilibrium Out of causal contact

8. Inflation

9. Inflation and the flatness problem

10. Log time |1-  | Pre-inflation inflation now Distant future

11. Phase transitions

12. Big bang nucleosynthesis