Possible evidence for a change in cosmic equation of state at decoupling

Details Possible evidence for a change in cosmic equation of state at decoupling Possible evidence for a change in cosmic equation of state at decoupling

1999-05-13

arxiv.org/abs/astro-ph/9905161v2

Astronomy and Astrophysics

Astrophysics

4 pages, RevTex; minor corrections

Scientific paper

Indirect but significative evidence (from fusion research data, and from the known 4He abundance) relevant to primordial nucleosynthesis is examined. It is shown that this evidence supports a change in cosmic equation of state at decoupling, compatible with Einstein's cosmological equations, from ROm T^4 aprox. cte (ROm=ROr) prior to decoupling (ttaf), being taf the atom formation time. Implications at the baryon threshold time (temperature) and beyond are discussed.

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