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Full-Text Articles in Astrophysics and Astronomy
Observational Constraints On General Relativistic Energy Conditions, Cosmic Matter Density And Dark Energy From X-Ray Clusters Of Galaxies And Type-La Supernovae, P. Schuecker, R. R. Caldwell, H. Böhringer, C. A. Collins
Observational Constraints On General Relativistic Energy Conditions, Cosmic Matter Density And Dark Energy From X-Ray Clusters Of Galaxies And Type-La Supernovae, P. Schuecker, R. R. Caldwell, H. Böhringer, C. A. Collins
Dartmouth Scholarship
New observational constraints on the cosmic matter density Ωm and an effectively redshift-independent equation
of state parameter wx of the dark energy are obtained while simultaneously testing the strong and null energy conditions of
general relativity on macroscopic scales. The combination of REFLEX X-ray cluster and type-Ia supernova data shows that
for a flat Universe the strong energy condition might presently be violated whereas the null energy condition seems to be
fulfilled. This provides another observational argument for the present accelerated cosmic expansion and the absence of exotic
physical phenomena related to a broken null energy condition. The marginalization of …