| Issue |
A&A
Volume 664, August 2022
|
|
|---|---|---|
| Article Number | A179 | |
| Number of page(s) | 19 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361/202243539 | |
| Published online | 30 August 2022 | |
The BEHOMO project: Λ Lemaître-Tolman-Bondi N-body simulations⋆
1
INAF – Osservatorio Astronomico di Trieste, 34131 Trieste, Italy
e-mail: valerio.marra@me.com
2
IFPU – Institute for Fundamental Physics of the Universe, 34151 Trieste, Italy
3
Núcleo Cosmo-ufes & Departamento de Física, Universidade Federal do Espírito Santo, 29075-910, Vitória, ES, Brazil
4
INFN – Sezione di Trieste, 34100 Trieste, Italy
5
PPGCosmo, Universidade Federal do Espírito Santo, 29075-910 Vitória, ES, Brazil
6
Dipartimento di Fisica, Sezione di Astronomia, Universitá di Trieste, 34143 Trieste, Italy
7
Dipartimento di Fisica e Astronomia “Augusto Righi”, Alma Mater Studiorum Universitá di Bologna, 40129 Bologna, Italy
Received:
14
March
2022
Accepted:
25
May
2022
Context. Our universe may feature large-scale inhomogeneities and anisotropies that cannot be explained by the standard model of cosmology, that is, the homogeneous and isotropic Friedmann-Lemaître-Robertson-Walker metric, on which the Λ cold dark matter model is built, may not accurately describe observations. Currently, there is not a satisfactory understanding of the evolution of the large-scale structure on an inhomogeneous background.
Aims. We have launched the cosmology beyond homogeneity and isotropy (BEHOMO) project to study the inhomogeneous Λ Lemaître-Tolman-Bondi model with the methods of numerical cosmology. Understanding the evolution of the large-scale structure is a necessary step in constraining inhomogeneous models with present and future observables and placing the standard model on more solid ground.
Methods. We perform Newtonian N-body simulations, whose accuracy in describing the background evolution is checked against the general relativistic solution. The large-scale structure of the corresponding Λ cold dark matter simulation is also validated.
Results. We obtain the first set of simulations of the Λ Lemaître-Tolman-Bondi model ever produced. The data products consist of 11 snapshots between redshift 0 and 3.7 for each of the 68 simulations that have been performed, together with halo catalogs and lens planes relative to 21 snapshots, between redshift 0 and 4.2, for a total of approximately 180 TB of data.
Conclusions. We plan to study the growth of perturbations at the linear and nonlinear level, gravitational lensing, and cluster abundances and proprieties.
Key words: large-scale structure of Universe / gravitation / cosmology: theory / cosmological parameters
Data can be obtained upon request. Further information is available at https://valerio-marra.github.io/BEHOMO-project
© V. Marra et al. 2022
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This article is published in open access under the Subscribe-to-Open model. Subscribe to A&A to support open access publication.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.