Number counts and dynamical vacuum cosmologies

N. Chandrachani Devi; H. A. Borges; S. Carneiro; J. S. Alcaniz

doi:10.1093/mnras/stu2662

Number counts and dynamical vacuum cosmologies

N. Chandrachani Devi, H. A. Borges, S. Carneiro, J. S. Alcaniz^*

^*Corresponding author for this work

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Abstract

We study non-linear structure formation in an interacting model of the dark sector of the Universe in which the dark energy density decays linearly with the Hubble parameter, ρΛ ∝H, leading to a constant-rate creation of cold dark matter. We derive all relevant expressions to calculate the mass function and the cluster number density using the Sheth-Torman formalism and show that the effect of the interaction process is to increase the number of bound structures of large masses (M≳ 10¹⁴M_⊙ h^-1) when compared to the standard Λ cold dark matter model. Since these models are not reducible to each other, this number counts signature can in principle be tested in future surveys.

Original language	English
Pages (from-to)	37-41
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society
Volume	448
Issue number	1
Early online date	2 Feb 2015
DOIs	https://doi.org/10.1093/mnras/stu2662
Publication status	Published - 21 Mar 2015
Externally published	Yes

Keywords

Cosmological parameters
Dark energy
Distance scale
Large-scale structure of Universe

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10.1093/mnras/stu2662

Number counts and dynamical vacuum cosmologies
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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AU - Alcaniz, J. S.

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Number counts and dynamical vacuum cosmologies

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Keywords

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