Spacetime curvature is important for cosmology constrained with supernova emissions

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Oeztas A. M., Smith M. L., Paul J.

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, cilt.47, sa.9, ss.2464-2478, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 47 Sayı: 9
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1007/s10773-008-9680-7
  • Dergi Adı: INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2464-2478
  • Anahtar Kelimeler: redshift, FRW, supernova, Planck constant, emission, HIGH-REDSHIFT SUPERNOVAE, IA SUPERNOVAE, DARK-MATTER, GENERAL-RELATIVITY, HUBBLE CONSTANT, TELESCOPE, MODEL, UNIVERSE, EVOLUTION, GALAXIES
  • Hacettepe Üniversitesi Adresli: Evet

Özet

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, Omega (k) , should not be ignored and it includes the combined contributions of huge spacetime magnitude and curvature.