Highly Influenced

# Astrophysical Ages and Time Scales ASP Conference Series, Vol. TBD, 2001

@inproceedings{Hippel2001AstrophysicalAA, title={Astrophysical Ages and Time Scales ASP Conference Series, Vol. TBD, 2001}, author={Ted von Hippel and Nadine Manset and Chris Simpson and John L. Tonry}, year={2001} }

- Published 2001

The age of the Universe depends on both the present-day Hubble Constant and on the history of cosmic expansion. For decelerating cosmologies such as Ω m = 1, the dimensionless product H 0 t 0 < 1 and modestly high values of the Hubble constant H 0 > 70 would be inconsistent with a cosmic age t 0 larger than 12 Gyr. But if Ω Λ > 0, then H 0 t 0 can take on a range of values. Evidence from the Hubble diagram for high redshift Type Ia supernovae favors Ω Λ ∼ 0.7 and H 0 t 0 ∼ 1. Then, if H 0 lies… CONTINUE READING