Skewness as a test of dark energy perturbations
We investigate the role played by dark energy perturbations in the skewness $S_3$ of large-scale matter distribution. We consider a two-fluid universe composed by matter and dark energy, with perturbations in both components, and we estimate numerically the skewness of the matter density field as a...
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| Main Authors: | , , |
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| Format: | Article (Journal) Chapter/Article |
| Language: | English |
| Published: |
29 April 2022
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| In: |
Arxiv
Year: 2022, Pages: 1-11 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/2202.08355
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| Author Notes: | Raquel Emy Fazolo, Luca Amendola, Hermano Velten |
| Summary: | We investigate the role played by dark energy perturbations in the skewness $S_3$ of large-scale matter distribution. We consider a two-fluid universe composed by matter and dark energy, with perturbations in both components, and we estimate numerically the skewness of the matter density field as a function of the dark energy parameters. We characterize today's $S_3$ value for quintessence and phantom dark energy cosmologies as well as its dependence on the matter density parameter $\Omega_{m0}$ and the dark energy sound speed $c^2_s$ with accurate numerical fitting. These fits can be used to test cosmology against future high quality data on large scale structure. |
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| Item Description: | Version 1 vom 16. Februar 2022, Version 2 vom 29. April 2022 Gesehen am 20.10.2022 |
| Physical Description: | Online Resource |