1999/07/01 by H. N. Núñez-Yépez, H.N. Núñez-Yépez · 3 citations
Physics and Astronomy · #Anisotropy #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Coupling (piping) #Hubble's law #Initial singularity #Isotropy #Noncommutative and Quantum Gravity Theories #Singularity #Universe #gr-qc
paper · pdf · doi:10.1016/s0375-9601(99)00357-6
published in Physics Letters A 258(4-6), 210-216 (Elsevier BV)
openalex publication_date 1999/07/01 · arxiv created 1999/08/19 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The dynamical effects on the scale factors due to the scalar ϕ-field at the early stages of a supposedly anisotropic Universe expansion in the scalar-tensor cosmology of Jordan-Brans and Dicke is studied. This universe shows an \sl isotropic evolution and, depending on the value of the theorie's coupling parameter ω, it can begin from a singularity if ω>0 and after expanding shrink to another one; or, if ω<0 and -3/2< ω≤ -4/3, it can evolve from a flat spatially-infinite state to a non extended singularity; or, if -4/3 < ω< 0, evolve from an extended singularity to a non singular state and, at last, proceed towards a singularity.