In a flat universe (k=0) and Lambda=0, the scale factor depends
on time according to: where t_H is the Hubble time, 1/H_0 and R_0
is the current scale factor.
In A Flat Universe K 0 And Lambda 0 The Scale Factor Depends On Time According To Where T H Is The Hubble Time 1 H 1 (6.48 KiB) Viewed 66 times
a) Show that if an event is observed at redshift z, the age of
the universe was
In A Flat Universe K 0 And Lambda 0 The Scale Factor Depends On Time According To Where T H Is The Hubble Time 1 H 2 (5.62 KiB) Viewed 66 times
b) Prove then that the current age of the Universe is
In A Flat Universe K 0 And Lambda 0 The Scale Factor Depends On Time According To Where T H Is The Hubble Time 1 H 3 (3.42 KiB) Viewed 66 times
t R= = 3 2 2/3 2/3 R. th
t(z) 2 1 3 (1+z)3/2 th
t(z=0)=2/3 th = Z H
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