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HISTORY EVENTS IN AN INFLATIONARY BIG BANG COSMOLOGY
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NIEL BRANDT (THANKS TO CARL AUDE FOR CONVERSION INTO ASCII)


Time (s)       T (Kelvin)  Reference   Event

THE QUANTUM GRAVITY ERA

1*10^{-43}     1*10^{32}   KT 72       Quantum limit of classical general 
                                       relativity

THE INFLATION AND SYMMETRY BREAKING ERA

1*10^{-38}     1*10^{29}   KT 72       Limit of perturbative interaction 
                                       thermalization of universe
1*10^{-35}     1*10^{28}   KT 72       Grand unification spontaneous symmetry 
                                       breaking
1*10^{-34}     1*10^{27}   KT 274      Approximate start of inflation
1*10^{-32}     1*10^{27}   KT 274      Approximate start of reheating and end 
                                       of inflation
1*10^{-11}     3*10^{15}   KT 72       Electroweak unification spontaneous 
                                       symmetry breaking

THE QUARK-LEPTON ERA

2*10^{-7}     2*10^{13}   HA 353       Tauon anti-tauon annihilation
1*10^{-5}     2*10^{12}   KT 72        Formation of hadrons from quarks
7*10^{-5}     1*10^{12}   HA 353       Muon anti-muon annihilation
5*10^{-4}     4*10^{11}   KT 159, 281  By this time the universe has a 
                                       baryon-antibaryon asymmetry which 
                                       results from post-inflationary B,C,CP 
                                       violating processes
1*10^{-1}     3*10^{10}   BS           Neutral current weak interactions 
                                       become too slow and neutrinos decouple
1*10^{0}      1*10^{10}   BS           Charged current weak interactions 
                                       become too slow and the neutron to 
                                       proton ratio freezes out
1*10^{1}      5*10^{9}    BS           Electron positron annihilation

THE RADIATION ERA

1*10^{2}      1*10^{9}    BS           Typical photon energies drop below the 
                                       deuteron binding energy and 
                                       nucleosynthesis begins
1*10^{3}      4*10^{8}    BS           Particle energies drop below Coulomb 
                                       barrier energies and nucleosynthesis 
                                       ends
4*10^{10}     6*10^{4}    KT 77        Matter density becomes equal to 
                                       radiation density

THE MATTER ERA

4*10^{12}          3.5*10^{3}  KT 78   Electrons and protons recombine into 
                                       hydrogen atoms
6*10^{12}          3.0*10^{3}  KT 80   Photon decoupling
2*10^{16}          20          HA 349  Start of the formation of galaxies
8*10^{16}          ---         ---     Approximate peak epoch of quasar 
                                       activity
X-1.4*10^{17}      ---         KT 12   Formation of the solar system
X-9.9*10^{16}      ---         HA 390  Emergence of life on Earth
X = 4.7*10^{17}    2.726       KT 12   Today

These values are rough estimates only. I have taken Omega_0 = 1, Lambda_0 = 0, 
and h = 1.

BS = Boesgaard & Steigman, Annual Reviews of Astronomy and 
     Astrophysics, vol. 23, 322
HA = Harrison, Cosmology: The Science of the Universe
KT = Kolb & Turner, The Early Universe