Cosmology Lecture 10 The early universe. Our benchmark universe (  CDM) H 0 = 72 km s -1 Mpc -1  0 = 1 - spatially flat   = 0.73  m = 0.27  m,baryon.

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Presentation transcript:

Cosmology Lecture 10 The early universe

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 = 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?

Matter dominated

Quantum fluctuations Galaxy clusters Inflation

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

Inflation

Inflation and the flatness problem

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

Phase transitions

Big bang nucleosynthesis