Constraining the Dark Universe

Details Constraining the Dark Universe Constraining the Dark Universe

2002-01-09

arxiv.org/abs/astro-ph/0201127v2

Nucl.Phys.Proc.Suppl. 110 (2002) 167-172

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, new reference added. To appear in the proceedings of TAUP 2001 (7th international workshop on Topics in As

Scientific paper

We combine complementary datasets to constrain dark energy. Using standard Big Bang Nucleosynthesis and the observed abundances of primordial nuclides to put constraints on $\Omega_Q$ at temperatures near $T \sim 1MeV$, we find the strong constraint $\Omega_Q({MeV}) < 0.045$ at $2\sigma$ 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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