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questions
4
votes
1
answer
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Pressure in Scott Dodelson's book Modern Cosmology
I am completely at a loss in deriving the equation 2.62 given in Scott Dodelson's Modern Cosmology book. That is the following expression for the pressure of Fermi-Dirac and Bose-Einstein ...
- 568
4
votes
1
answer
1k
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Boltzmann equation in cosmology
I have a question about the Boltzmann equation in cosmology.
Im trying to understand how this can hold? Where does the logarithmic terms come from?
It is explained quite well here http://www.damtp....
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2
votes
1
answer
158
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Cosmological Boltzmann equation [closed]
Consider the Boltzmann equation:
$$\frac{d \ln{n^c(T)}}{d \ln{T}} = \frac{\Gamma}{H}(1 - \frac{n^c_{eq}(T)}{n^c(T)})$$
We know that the ratio $\Gamma/H$ can be considered constant, let us put it ...
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