Probing a cosmological model with a $\Lambda ={\Lambda }_0+3\beta H^2$ decaying-vacuum

Abstract

In this work we study the evolution of matter-density perturbations for an arbitrary $\Lambda (t)$ model, and specialize our analysis to the particular phenomenological law $\Lambda ={\Lambda }_0+3\beta H^2$. We study the evolution of the cosmic star formation rate in this particular dark energy scenario and, by constraining the $\beta$ parameter using both the age of the universe and the cosmic star formation rate curve, we show that it leads to a reasonable physical model for $\beta \lesssim 0.1$.

Published in Physical Review D

References in corpus (4)

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• Cosmological constant and vacuum energy: old and new ideas
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• Cosmological model with decaying vacuum energy law from principles of quantum mechanics
• Friedmann cosmology with decaying vacuum density in Brans-Dicke theory
• Running vacuum in Brans-Dicke theory: a possible cure for the ${\sigma }_8$ and $H_0$ tensions
• Dynamical system approach to running $\Lambda$ cosmological models
• Cosmological models with running cosmological term and decaying dark matter
• Viscous fluid dynamics with decaying vacuum energy density
• Cosmology from a running vacuum model driven by a scalar field