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Cosmological solutions of the Einstein-Friedmann equations ...

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Cosmology<br />

t = 2<br />

3 H−1 (t) (EdS)<br />

Hence in <strong>the</strong> EdS universe everything is fixed for given H0:<br />

Present values:<br />

H0 0.83 × 10 −28 cm −1 × c<br />

ρ0 EdS 1.2 × 10 −29 gr/cm 3 × c 2<br />

t0 EdS = 2<br />

3 H−1<br />

0 8.1 × 109 years (EdS age <strong>of</strong> <strong>the</strong> universe)<br />

c○ 2009, F. Jegerlehner ≪❘ Lect. 7 ❘≫ 451

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