11
The
Standard Dust Models (Λ=0)
•Have
a Newtonian Analog:
–Replace x by comoving value r
using the scale factor R, x = Rr, and express density in terms of its value at
the present epoch ρ = ρ0R-3, then:
–Which matches eq. 7.1 for dust and lambda=0. Multiplying by the derivative of
R and integrating gives us essentially eq. 7.2
