Quasilinear observables in dark energy cosmologies

• Verfasst von: Rampf, Cornelius [VerfasserIn]
• Verfasst von: Villa, Eleonora [VerfasserIn]
• Verfasst von: Amendola, Luca [VerfasserIn]
• Titel: Quasilinear observables in dark energy cosmologies
• Verf.angabe: Cornelius Rampf, Eleonora Villa, and Luca Amendola
• Fussnoten: Gesehen am 20.10.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2017
• Band/Heft Quelle: (2017) Artikel-Nummer 1703.09228, 14 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1564603121

Abstract

What are the fundamental limitations of reconstructing the properties of dark energy, given cosmological observations in the quasilinear regime in a range of redshifts, to be as precise as required? The aim of this paper is to address this question by constructing model-independent observables, whilst completely ignoring practical problems of real-world observations. Non-Gaussianities already present in the initial conditions are not directly accessible from observations, because of a perfect degeneracy with the non-Gaussianities arising from the nonlinear matter evolution in generalized dark energy models. By imposing a specific set of evolution equations that should cover a range of dark energy cosmologies, we however find a constraint equation for the linear structure growth rate