15
The
Standard Dust Models (Λ=0)
•This
is easy to interpret.
–When Ω0 < 1, universe is open, hyperbolic,
and expands to infinity with
finite velocity.
–When Ω0 > 1, universe is closed, spherical,
and eventually collapse after
reaching a maximum size after a time:
–Recollapses
after a time t = 2 tmax.
–When Ω0 = 1, universe is critical, flat, and
expands to infinity with velocity
approaching zero. Einstein-de Sitter model:
