Cosmological constants and variations

Details Cosmological constants and variations Cosmological constants and variations

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jphcs..24..253b&link_type=abstract

Journal of Physics: Conference Series, Volume 24, Issue 1, pp. 253-267 (2005).

Physics

Scientific paper

We review properties of theories for the variation of the gravitation and fine structure 'constants'. We highlight some general features of the cosmological models that exist in these theories with reference to recent quasar data that is consistent with time-variation in the fine structure 'constant' since a redshift of 3.5. The behaviour of a simple class of varyingalpha cosmologies is outlined in the light of all the observational constraints. We also discuss some of the consequences of varying 'constants' for oscillating universes and show by means of exact solutions that they appear to evolve monotonically in time even though the scale factor of the universe oscillates.

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