2021/12/08 by Hilberto M. R. da Silva, Tiberiu Harko, da Silva, Hilberto M. R. +5
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc)
paper · pdf · doi:10.48550/arxiv.2112.05272
openalex publication_date 2021/12/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this work we will explore U(1) local cosmic string solutions in the context of the generalized hybrid metric-Palatini theory of gravity in its scalar-tensor representation. Using a general static cylindrically symmetric metric to find the dynamical equations for this particular case, we will simplify the equations by imposing boost invariance along t and z directions. The strings properties are determined by both scalar fields and by the effective potential, function of the scalar fields. While for some forms of the potential, the dynamical equations can be solved exactly, for more general forms of the potential the solutions are found numerically. Several stable string configurations were found, whose basic parameters depend essentially on the effective field potential, and on the boundary conditions.