Skewness as a test of dark energy perturbations

• Verfasst von: Fazolo, Raquel Emy [VerfasserIn]
• Verfasst von: Amendola, Luca [VerfasserIn]
• Verfasst von: Velten, Hermano [VerfasserIn]
• Titel: Skewness as a test of dark energy perturbations
• Verf.angabe: Raquel Emy Fazolo, Luca Amendola, Hermano Velten
• E-Jahr: 2022
• Jahr: 29 April 2022
• Umfang: 11 S.
• Fussnoten: Version 1 vom 16. Februar 2022, Version 2 vom 29. April 2022 ; Gesehen am 20.10.2022
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2022
• Band/Heft Quelle: (2022), Artikel-ID 2202.08355, Seite 1-11
• DOI: doi:10.48550/arXiv.2202.08355
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Astrophysics - Cosmology and Nongalactic Astrophysics
• K10plus-PPN: 1804112577

Abstract

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.