Cosmic vacuum and the `flatness problem' in the concordant model
Abstract
The recent measurements of the cosmological constant, or cosmic vacuum, [AJ, 116 (1998) 1009; ApJ, 517 (1999) 565] are used in combination with all current datasets to demonstrate that the cosmological density parameter Ω(t) is exactly unity or nearly unity at any epoch of the Friedmann expansion. It means that the expansion is exactly parabolic or nearly parabolic and the spatial geometry is exactly flat or nearly flat, in the updated standard cosmological model. No fine-tuning is needed to account for the observed flatness of the 3-space in this model. A robust epoch-independent symmetry relation between vacuum and matter is basically behind the phenomenon of flatness.
- Publication:
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New Astronomy
- Pub Date:
- January 2003
- DOI:
- arXiv:
- arXiv:astro-ph/0211489
- Bibcode:
- 2003NewA....8...79C
- Keywords:
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- Astrophysics
- E-Print:
- 9 pages, LaTeX, no figure