WMAP constraints on low redshift evolution of dark energy

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dc.creatorJassal, H. K.
dc.creatorBagla, J. S.
dc.creatorPadmanabhan, T.
dc.date2004-04-20
dc.date2004-11-03
dc.date.accessioned2026-07-07T02:12:56Z
dc.date.available2026-07-07T02:12:56Z
dc.descriptionThe conceptual difficulties associated with a cosmological constant have led to the investigation of alternative models in which the equation of state parameter, $w=p/ρ$, of the dark energy evolves with time. We show that combining the supernova type Ia observations {\it with the constraints from WMAP observations} restricts large variation of $ρ(z)$ at low redshifts. The combination of these two observational constraints is stronger than either one. The results are completely consistent with the cosmological constant as the source of dark energy.
dc.descriptionFinal version to appear in MNRAS (Letters); discussion enlarged and clarifications and references added; 6 pages; 3 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0404378
dc.identifierhttp://arxiv.org/abs/astro-ph/0404378
dc.identifierMon.Not.Roy.Astron.Soc. 356 (2005) L11-L16
dc.identifierdoi:10.1111/j.1745-3933.2005.08577.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7637
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleWMAP constraints on low redshift evolution of dark energy
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