期刊
ASTRONOMY & ASTROPHYSICS
卷 664, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/202243539
关键词
large-scale structure of Universe; gravitation; cosmology; theory; cosmological parameters
资金
- CNPq(Brazil)
- FAPES (Brazil)
- European Union [888258]
- INFN [IN-DARK PD51]
- CAPES
- Miur grant `ClustersXEuclid' [R165SBKTMA]
- grant PRIN-MIUR 2017 [WSCC32]
- computing centre of Cineca
- INAF
- Marie Curie Actions (MSCA) [888258] Funding Source: Marie Curie Actions (MSCA)
The study focuses on the evolution of large-scale structures in an inhomogeneous background using numerical cosmology. By conducting simulations, the researchers aim to gain a better understanding of the cosmic evolution and refine the standard model.
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-Lemaitre-Robertson-Walker metric, on which the ? 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 ? Lemaitre-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 ? cold dark matter simulation is also validated. Results. We obtain the first set of simulations of the ? Lemaitre-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.
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