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Constraining the Dark Universe

Rachel Bean·Steen H. Hansen·Alessandro Melchiorri
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Abstract

We combine complementary datasets to constrain dark energy. Using standard Big Bang Nucleosynthesis and the observed abundances of primordial nuclides to put constraints on $Ω_Q$ at temperatures near $T \sim 1MeV$, we find the strong constraint $Ω_Q({MeV}) < 0.045$ at $2σ$ c.l.. Under the assumption of flatness, using results from Cosmic Microwave Background (CMB) anisotropy measurements, high redshift supernovae (SN-Ia) observations and data from local cluster abundances we put a new constraint on the equation of state parameter $w_Q < -0.85$ at 68% c.l..

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Rachel Bean, Steen H. Hansen, Alessandro Melchiorri. 2002-01-10. Constraining the Dark Universe. https://doi.org/10.1016/s0920-5632(02)01475-5

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