Partial rip scenario - a cosmology with a growing cosmological term

Abstract

A cosmology with the growing cosmological term is considered. If there is no exchange of energy between vacuum and matter components, the requirement of general covariance implies the time dependence of the gravitational constant $G$. Irrespectively of the exact functional form of the cosmological term growth, the universe ends in a de Sitter regime with a constant asymptotic $\Lambda$, but vanishing $G$. Although there is no divergence of the scale factor in finite time, such as in the "Big Rip" scenario, gravitationally bound systems eventually become unbound. In the case of systems bound by non-gravitational forces, there is no unbounding effect, as the asymptotic $\Lambda$ is insufficiently large to disturb these systems.

v1: 12 pages, 4 figures. v2: minor changes in the text, references added. v3: 13 pages, 4 figures, several paragraphs and references added, comparison with the observational bounds introduced. To appear in Phys. Lett. B

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Cited by in corpus (16)

• Energy conditions in f(R)-gravity
• The Fate of Bound Systems in Phantom and Quintessence Cosmologies
• Running G and Λat low energies from physics at M_X: possible cosmological and astrophysical implications
• Dark energy cosmology with generalized linear equation of state
• Cosmological Evolution of Interacting Phantom Energy with Dark Matter
• Phantom-like GCG and the constraints of its parameters via cosmological dynamics
• Renormalization-group running cosmologies - a scale-setting procedure
• Statefinders, higher-order energy conditions and sudden future singularities
• Strings at future singularities
• Dark energy models with time-dependent gravitational constant
• Variable Equation of State for Generalized Dark Energy Model
• Future state of the Universe
• Scenario of Accelerating Universe from the Phenomenological Λ- Models
• A bound system in the expanding universe with modified holographic Ricci dark energy and dark matter
• Stability of Differentially Rotating Disks in $f(T)$ Theory
• Possible Dark States induced by a Surface Wave along a Vacuum-Matter Boundary