Prospects for probing the dark energy via supernova distance measurements

Abstract

Distance measurements to Type Ia supernovae (SNe Ia) indicate that the Universe is accelerating and that two-thirds of the critical energy density exists in a dark-energy component with negative pressure. Distance measurements to SNe Ia can be used to distinguish between different possibilities for the dark energy, and if it is an evolving scalar field, to reconstruct the scalar-field potential. We derive the reconstruction equations and address the feasibility of this approach by Monte-Carlo simulation.Comment: 10 pages LaTeX with 3 eps figures. Reconstruction of the equation of state added + some minor changes. To appear in PRD Rapid