Do recent supernovae Ia observations tend to rule out all the cosmologies?

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dc.creatorVishwakarma, Ram Gopal
dc.date2005-11-21
dc.date2008-01-18
dc.date.accessioned2026-07-07T11:24:59Z
dc.date.available2026-07-07T11:24:59Z
dc.descriptionDark energy and the accelerated expansion of the universe have been the direct predictions of the distant supernovae Ia observations which are also supported, indirectly, by the observations of the CMB anisotropies, gravitational lensing and the studies of galaxy clusters. Today these results are accommodated in what has become the `concordance cosmology': a universe with flat spatial sections t=constant with about 70% of its energy in the form of Einstein's cosmological constant Λ. However, we find that as more and more supernovae Ia are observed, more accurately and towards higher redshift, the probability that the data are well explained by the cosmological models decreases alarmingly, finally ruling out the concordance model at more than 95% confidence level. This raises doubts against the `standard candle'-hypothesis of the supernovae Ia and their use to constrain the cosmological models. We need a better understanding of the entire SN Ia phenomenon in order to have cosmological consequences from them.
dc.descriptionReplaced with published version
dc.identifierhttps://arxiv.org/abs/astro-ph/0511628
dc.identifierhttp://arxiv.org/abs/astro-ph/0511628
dc.identifierInt.J.Mod.Phys.D16:1641-1651,2007
dc.identifierdoi:10.1142/S0218271807011036
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195376
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleDo recent supernovae Ia observations tend to rule out all the cosmologies?
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