New dark energy constraints from supernovae, microwave background and galaxy clustering

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  • 11 March 2004
Abstract
Using the spectacular new high redshift supernova observations from the HST/GOODS program and previous supernova, CMB and galaxy clustering data, we make the most accurate measurements to date of the dark energy density rho_X as a function of cosmic time, constraining it in a rather model-independent way. We find that Einstein's vanilla scenario where rho_X(z) is constant remains consistent with these new tight constraints, and that a big crunch or big rip is more than 50 gigayears away for a broader class of models allowing such cataclysmic events.

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