Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-09-11
Astronomy and Astrophysics
Astrophysics
20 page Latex file
Scientific paper
A strictly linear evolution of the cosmological scale factor is surprisingly an excellent fit to a host of cosmological observations. Any model that can support such a coasting presents itself as a falsifiable model as far as classical cosmological tests are concerned. This article discusses the concordance of such an evolution in relation to several standard observations. Such evolution is known to be comfortably concordant with the Hubble diagram as deduced from current supernovae 1a data, it passes constraints arising from the age and gravitational lensing statistics and just about clears basic constraints on nucleosynthesis. Such an evolution exhibits distinguishable and verifiable features for the recombination era. The overall viability of such models is discussed.
Gehlaut Savita
Lohiya Daksh
Mahajan Smriti
Mukherjee Antara
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