Work

Dynamics of Einstein–Aether scalar field cosmology

Year: 2019

Type: article

Abstract: We study the cosmological evolution of the field equations in the context of Einstein–Aether cosmology by including a scalar field in a spatially flat Friedmann–Lemaître–Robertson–Walker spacetime. Our analysis is separated into two separate where a pressureless fluid source is included or absent. In particular, we determine the critical points of the field equations and we study the stability of the specific solutions. The limit of general relativity is fully recovered, while the dynamical system admits de Sitter solutions which can describe the past inflationary era and the future late-time attractor. Results for generic scalar field potentials are presented while some numerical behaviours are given for specific potential forms.

Source: The European Physical Journal C

DOI: 10.1140/epjc/s10052-019-7229-y

Authors: Andronikos Paliathanasis, G. Papagiannopoulos, Spyros Basilakos, John D. Barrow

Institutions: Durban University of Technology, National and Kapodistrian University of Athens, Academy of Athens, National Observatory of Athens, University of Cambridge

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Hellenic Foundation for Research and Innovation, Science and Technology Facilities Council

Awards: G3563244976, G5973301827