Oscillating non-linear large-scale structures in growing neutrino quintessence

• Verfasst von: Baldi, Marco [VerfasserIn]
• Verfasst von: Amendola, Luca [VerfasserIn]
• Verfasst von: Wetterich, Christof [VerfasserIn]
• Titel: Oscillating non-linear large-scale structures in growing neutrino quintessence
• Verf.angabe: Marco Baldi, Valeria Pettorino, Luca Amendola and Christof Wetterich
• Umfang: 16 S.
• Fussnoten: Gesehen am 13.11.2017
• Titel Quelle: Enthalten in: Royal Astronomical Society: Monthly notices of the Royal Astronomical Society
• Jahr Quelle: 2011
• Band/Heft Quelle: 418(2011), 1, S. 214-229
• ISSN Quelle: 1365-2966
• DOI: doi:10.1111/j.1365-2966.2011.19477.x
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565260856

Abstract

Growing neutrino quintessence describes a form of dynamical dark energy that could explain why dark energy dominates the universe only in recent cosmological times. This scenario predicts the formation of large-scale neutrino lumps which could allow for observational tests. We perform for the first time N-body simulations of the non-linear growth of structures for cold dark matter (CDM) and neutrino fluids in the context of growing neutrino cosmologies. Our analysis shows a pulsation increase and subsequent decrease in the neutrino density contrast. This could lead to interesting observational signatures, as an enhanced bulk flow in a situation where the DM density contrast differs only very mildly from the standard ΛCDM scenario. We also determine for the first time the statistical distribution of neutrino lumps as a function of mass at different redshifts. Such determination provides an essential ingredient for a realistic estimate of the observational signatures of growing neutrino cosmologies. Due to a breakdown of the non-relativistic Newtonian approximation, our results are limited to redshifts z≥ 1.