Year: 2006
Type: article
Abstract: In this paper causal geodesic completeness of Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) cosmological models is analyzed in terms of generalized power expansions of the scale factor in coordinate time. The strength of the found singularities is discussed following the usual definitions due to Tipler and Kr\'olak. It is shown that while classical cosmological models are both timelike and lightlike geodesically incomplete, certain observationally allowed models which have been proposed recently are lightlike geodesically complete.
Authors: L. Fernández-Jambrina, Ruth Lazkoz
Institution: Universidad Politécnica de Madrid
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2103427952