Effective description of dark matter as a viscous fluid

• Verfasst von: Flörchinger, Stefan [VerfasserIn]
• Titel: Effective description of dark matter as a viscous fluid
• Verf.angabe: Stefan Floerchinger, Mathias Garny, Nikolaos Tetradis, and Urs Achim Wiedemann
• E-Jahr: 2016
• Jahr: 28 October 2016
• Umfang: 8 S.
• Fussnoten: Gesehen am 02.09.2020
• Titel Quelle: Enthalten in: International Conference on New Frontiers in Physics (5. : 2016 : Kolymbari)5th International Conference on New Frontiers in Physics
• Ort Quelle: [Les Ulis] : EDP Sciences, 2017
• Jahr Quelle: 2016
• Band/Heft Quelle: (2016) Artikel-Nummer 03018, 8 Seiten
• DOI: doi:10.1051/epjconf/201612503018
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565708741

Abstract

Treating dark matter at large scales as an effectively viscous fluid provides an improved framework for the calculation of the density and velocity power spectra compared to the standard assumption of an ideal pressureless fluid. We discuss how this framework can be made concrete through an appropriate coarse-graining procedure. We also review results that demonstrate that it improves the convergence of cosmological perturbation theory.