Comment on ``Observational constraints on power-law cosmologies''

Details Comment on ``Observational constraints on power-law cosmologies'' Comment on ``Observational constraints on power-law cosmologies''

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phrvd..60j8301s&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 60, Issue 10, 15 November 1999, id. 108301

Mathematics

Logic

24

Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

``Power-law cosmologies'' are defined by their growth of the cosmological scale factor as tα regardless of the matter content or cosmological epoch. Constraints from the current age of the universe and from the high redshift supernovae data require ``large'' α (~1). We reinforce this with the latest available observations. Such a large α is also consistent with the right amount of helium and the lowest observed metallicity in the universe for a model with the baryon entropy ratio ~8.1×10-9.

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