New Dark Energy Constraints from Supernovae, Microwave Background, and Galaxy Clustering

June 2004 • 2004PhRvL..92x1302W

Authors • Wang, Yun • Tegmark, Max

Abstract • Using supernova, cosmic microwave background, and galaxy clustering data, we make the most accurate measurements to date of the dark energy density ρ_X as a function of cosmic time, constraining it in a rather model-independent way, assuming a flat universe. We find that Einstein’s simplest scenario, where ρ_X(z) is constant, remains consistent with these new tight constraints and that a big crunch or big rip is more than 50Gyr away for a broader class of models allowing such cataclysmic events. We discuss popular pitfalls and hidden priors.

Links

• PREPRINT http://arxiv.org/abs/astro-ph/0403292
• SPIRES http://inspirehep.net/search?p=find+j+PRLTA,92,241302
• ELECTR http://link.aps.org/doi/10.1103/PhysRevLett.92.241302
• SPIRES http://inspirehep.net/search?p=find+eprint+astro-ph/0403292