1999/05/18 by J. -F. Pascual-Sánchez, J.‐F. Pascual‐Sánchez · 4 citations
Physics and Astronomy · #Acceleration #Astrophysics #Barotropic fluid #COSMIC cancer database #Classical mechanics #Cosmological principle #Cosmology #Cosmology and Gravitation Theories #Dark energy #Equation of state #Friedmann–Lemaître–Robertson–Walker metric #Galaxy #Gamma-ray bursts and supernovae #Isotropy #Lambda-CDM model #Mechanics #Physical cosmology #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Redshift #Supernova #astro-ph #gr-qc
paper · pdf · doi:10.1142/s0217732399001632
published as Mod.Phys.Lett. A14 (1999) 1539-1544 · LATEX, 7 pags, no figs, Honorable Mention in the 1999 Essay Competition of the Gravity Research Foundation
arxiv created 1999/05/18 · openalex publication_date 1999/07/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this letter, we present an alternative explanation for the cosmic acceleration which appears as a consequence of recent high redshift supernova data. In the usual interpretation, this cosmic acceleration is explained by the presence of a positive cosmological constant or vacuum energy, in the background of Friedmann models. Instead, we shall consider a local rotational symmetric (LRS) inhomogeneous space–time, with a barotropic perfect fluid equation of state for the cosmic matter. Within this framework the kinematical acceleration of the cosmic fluid or, equivalently, the inhomogeneity of matter, is just the responsible of the SNe Ia measured cosmic acceleration. Although in our model the Cosmological Principle is relaxed, it maintains local isotropy about our worldline in agreement with CBR observations.