Resolving the Cosmological Missing Energy Problem
Abstract
Some form of missing energy may account for the difference between the observed cosmic matter density and the critical density. Two leading candidates are a cosmological constant and quintessence (a time-varying, inhomogenous component with negative pressure). We show that an ideal, full-sky cosmic background anisotropy experiment may not be able to distinguish the two and, due to this ambiguity, may not determine the matter density or Hubble constant. We further show that degeneracy may remain even after considering classical cosmological tests and measurements of large scale structure.Keywords
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