The Hubble constant

Details The Hubble constant The Hubble constant

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000pasa...17...45m&link_type=abstract

Publications Astronomical Society of Australia, vol. 17, no. 1, p. 45-47

Astronomy and Astrophysics

Astronomy

1

Distance Scales, Galaxy Formation

Scientific paper

With the completion of the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, it is interesting to form the dimensionless quantity H0 t0 by multiplying the Hubble Constant by the age of the Universe. In a matter dominated decelerating Universe with a density exceeding 0.26 of the critical value, H0t0 < 1; in an accelerating Universe with the same Ωm = 0.26, but dominated by vacuum energy with ΩV >= 1 - &Omegam, we have H0t0 >=e 1. If the first globular clusters formed 109 years after the Big Bang, then with 95% confidence H0t0 = 1.0 ± 0.3. The classical Einstein-de Sitter cosmological model has H0t0 = 2/3.

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