The State of the Dark Energy Equation of State

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dc.creatorMelchiorri, Alessandro
dc.creatorMersini, Laura
dc.creatorOdman, Carolina J.
dc.creatorTrodden, Mark
dc.date2002-11-24
dc.date2003-04-16
dc.date.accessioned2026-07-07T10:31:27Z
dc.date.available2026-07-07T10:31:27Z
dc.descriptionBy combining data from seven cosmic microwave background experiments (including the latest WMAP results) with large scale structure data, the Hubble parameter measurement from the Hubble Space Telescope and luminosity measurements of Type Ia supernovae we demonstrate the bounds on the dark energy equation of state $w_Q$ to be $-1.38< w_Q <-0.82$ at the 95% confidence level. Although our limit on $w_Q$ is improved with respect to previous analyses, cosmological data does not rule out the possibility that the equation of state parameter $w_Q$ of the dark energy $Q$ is less than -1. We present a tracking model that ensures $w_Q \le -1$ at recent times and discuss the observational consequences.
dc.description7 pages, 4 figures, added a reference
dc.identifierhttps://arxiv.org/abs/astro-ph/0211522
dc.identifierhttp://arxiv.org/abs/astro-ph/0211522
dc.identifierPhys.Rev.D68:043509,2003
dc.identifierdoi:10.1103/PhysRevD.68.043509
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178417
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleThe State of the Dark Energy Equation of State
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