Hostname: page-component-cb9f654ff-c75p9 Total loading time: 0 Render date: 2025-08-04T04:13:00.137Z Has data issue: false hasContentIssue false
  • English
  • Français

The Hubble Constant

Published online by Cambridge University Press:  05 March 2013

Jeremy Mould
Jeremy Mould*
Affiliation:
Research School of Astronomy & Astrophysics, Australian National University, Mount Stromlo Observatory, Weston, ACT 2611, Australia; jrm@mso.anu.edu.au
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

With the completion of the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, it is interesting to form the dimensionless quantity H 0 t 0 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, H 0 t 0 < 1; in an accelerating Universe with the same Ωm = 0·26, but dominated by vacuum energy with ΩV ≥ 1 – Ωm , H 0 t 0 ≥ 1. If the first globular clusters formed 109 years after the Big Bang, then with 95% confidence H 0 t 0 =1·0 ± 0·3. The classical Einstein–de Sitter cosmological model has H 0 t 0 = ⅔.

Keywords

cosmology: distance scalegalaxies: formation

Information

Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 17 , Issue 1 , 2000 , pp. 45 - 47
Copyright
Copyright © Astronomical Society of Australia 2000

References

Carretta, E., Gratton, R., Clementini, G., & Fusi Pecci, F. 1999, astro-ph 99 02086Google Scholar
Carroll, S., Press, W., & Turner, E. 1992, ARA&A, 30, 409 Google Scholar
Chaboyer, B., Demarque, P., Kernan, P. J., & Krauss, L. M. 1998, ApJ, 494, 96 CrossRefGoogle Scholar
Ferrarese, L., et al. 1999, ApJ 529, 745 CrossRefGoogle Scholar
Freedman, et al. 2000, in preparationGoogle Scholar
Gibson, B., et al. 1999, ApJ, 529, 723 CrossRefGoogle Scholar
Gratton, R., et al. 1998, ApJ, 491, 749 CrossRefGoogle Scholar
Hamuy, M., Phillips, M., Suntzeff, N., Schommer, R., Maza, J., & Aviles, R. 1996, AJ, 112, 2398 CrossRefGoogle Scholar
Huchra, J. 1999, http://cfawww.harvard.edu/~huchra Google Scholar
Kelson, D., et al. 1999, ApJ, 529, 768 CrossRefGoogle Scholar
Kennicutt, R. C. Jr, Freedman, W. L., & Mould, J. R. 1995, AJ, 110, 1476 CrossRefGoogle Scholar
Mould, J. 1998, Nature, 395, A20 Google Scholar
Mould, J., et al. 1999, ApJ, 529, 786 CrossRefGoogle Scholar
Pahre, M. 1997, PhD thesis, Caltech Google Scholar
Peacock, J. 1999, Cosmological Physics (Cambridge Univ. Press).CrossRefGoogle Scholar
Pont, M., Mayor, M., Turon, C., & VandenBerg, D. 1998, A&A, 329, 87 Google Scholar
Reid, I. N. 1997, AJ, 114, 161 CrossRefGoogle Scholar
Reiss, A., Germany, L., Schmidt, B., & Stubbs, C. 1998, AJ, 115, 26 CrossRefGoogle Scholar
Sakai, S., et al. 1999, ApJ, 529, 698 CrossRefGoogle Scholar
Tammann, G. 1998, Proc. 8th Marcel Grossman Symposium, ed. T. Piran (Singapore: World Scientific), in pressGoogle Scholar
Tonry, J., et al. 1999, ApJ, 530, 625 CrossRefGoogle Scholar