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Spacetime curvature is important for cosmology constrained with supernova emissions
Hacettepe University, Ankara.
Anabolic Laboratories, Inc., Tempe, AZ.
2008 (English)In: International journal of theoretical physics, ISSN 0020-7748, E-ISSN 1572-9575, Vol. 47, no 9, 2464-2478 p.Article in journal (Refereed) Published
Abstract [en]

We investigate universe expansion models as functions of emission frequency ratio decline rather than redshift z, using the latest on-line, self-consistent data from 192 supernovae. We present results for simpler and some current models of cosmology, including those with dark energy (standard model) and a recent model correcting for the effect of a small time-dependent, emission frequency increase with lookback. This new model, with a gentle lookback decline of the Planck constant, and the standard model fit the data with similar confidence according to Bayesian Information Criteria. The standard model tends towards solutions high in matter density while remaining flat, but models without dark energy tend towards dilute universes with significant spacetime and curvature and a smaller Hubble constant. We conclude the normalized spacetime parameter, Ω k , should not be ignored and it includes the combined contributions of huge spacetime magnitude and curvature.

Place, publisher, year, edition, pages
2008. Vol. 47, no 9, 2464-2478 p.
Research subject
URN: urn:nbn:se:ltu:diva-15434DOI: 10.1007/s10773-008-9680-7Local ID: ef0a3260-3951-11dd-8721-000ea68e967bOAI: diva2:988408
Validerad; 2008; 20080613 (ysko)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

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Paul, Jan
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