Non-Linear Matter Power Spectrum Modeling in Interacting Dark Energy Cosmologies
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917822068686848 |
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| author | Silva, Emanuelly Zúñiga-Bolaño, Ubaldo Nunes, Rafael C. Di Valentino, Eleonora |
| author_facet | Silva, Emanuelly Zúñiga-Bolaño, Ubaldo Nunes, Rafael C. Di Valentino, Eleonora |
| contents | Understanding the behavior of the matter power spectrum on non-linear scales beyond the $Λ$CDM model is crucial for accurately predicting the large-scale structure (LSS) of the Universe in non-standard cosmologies. In this work, we present an analysis of the non-linear matter power spectrum within the framework of interacting dark energy-dark matter cosmologies (IDE). We employ N-body simulations and theoretical models to investigate the impact of IDE on these non-linear scales. Beginning with N-body simulations characterized by a fixed parameter space delineated by prior observational research, we adeptly fit the simulated spectra with a simple parametric function, achieving accuracy within 5\%. Subsequently, we refine a modified halo model tailored to the IDE cosmology, exhibiting exceptional precision in fitting the simulations down to scales of approximately 1 h/Mpc. To assess the model's robustness, we conduct a forecast analysis for the Euclid survey, employing our refined model. We find that the coupling parameter $ξ$ will be constrained to $σ(ξ) = 0.0110$. This marks a significant improvement by an order of magnitude compared to any other current observational tests documented in the literature. These primary findings pave the way for a novel preliminary approach, enabling the utilization of IDE models for observational constraints concerning LSS data on non-linear scales. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_19590 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-Linear Matter Power Spectrum Modeling in Interacting Dark Energy Cosmologies Silva, Emanuelly Zúñiga-Bolaño, Ubaldo Nunes, Rafael C. Di Valentino, Eleonora Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology Understanding the behavior of the matter power spectrum on non-linear scales beyond the $Λ$CDM model is crucial for accurately predicting the large-scale structure (LSS) of the Universe in non-standard cosmologies. In this work, we present an analysis of the non-linear matter power spectrum within the framework of interacting dark energy-dark matter cosmologies (IDE). We employ N-body simulations and theoretical models to investigate the impact of IDE on these non-linear scales. Beginning with N-body simulations characterized by a fixed parameter space delineated by prior observational research, we adeptly fit the simulated spectra with a simple parametric function, achieving accuracy within 5\%. Subsequently, we refine a modified halo model tailored to the IDE cosmology, exhibiting exceptional precision in fitting the simulations down to scales of approximately 1 h/Mpc. To assess the model's robustness, we conduct a forecast analysis for the Euclid survey, employing our refined model. We find that the coupling parameter $ξ$ will be constrained to $σ(ξ) = 0.0110$. This marks a significant improvement by an order of magnitude compared to any other current observational tests documented in the literature. These primary findings pave the way for a novel preliminary approach, enabling the utilization of IDE models for observational constraints concerning LSS data on non-linear scales. |
| title | Non-Linear Matter Power Spectrum Modeling in Interacting Dark Energy Cosmologies |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2403.19590 |