Web of Science: 3 citations, Scopus: 3 citations, Google Scholar: citations
Strategies to Ascertain the Sign of the Spatial Curvature
Ferreira, Pedro C. (Universidade Federal do Rio Grande do Norte. Escola de Ciências e Tecnologia)
Pavón Coloma, Diego (Universitat Autònoma de Barcelona. Departament de Física)

Date: 2016
Abstract: The second law of thermodynamics, in the presence of gravity, is known to hold at small scales, as in the case of black holes and self-gravitating radiation spheres. Using the Friedmann-Lemaître-Robertson-Walker metric and the history of the Hubble factor, we argue that this law also holds at cosmological scales. Based on this, we study the connection between the deceleration parameter and the spatial curvature of the metric, Wk, and set limits on the latter, vàlid for any homogeneous and isotropic cosmological model. Likewise, we devise strategies to determine the sign of the spatial curvature index k. Finally, assuming the lambda cold dark matter model is correct, we find that the acceleration of the cosmic expansion is increasing today.
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: Article ; recerca ; Versió publicada
Subject: Mathematical cosmology ; Spatial curvatur ; Thermodynamics
Published in: Universe, Vol. 2 Núm. 4 (November 2016) , p. 1-10, ISSN 2218-1997

DOI: 10.3390/universe2040027


10 p, 449.9 KB

The record appears in these collections:
Articles > Research articles
Articles > Published articles

 Record created 2016-12-09, last modified 2024-06-01



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