Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Blas, Diego [VerfasserIn]  |
| Flörchinger, Stefan [VerfasserIn]  |
Titel: | Large scale structure from viscous dark matter |
Verf.angabe: | Diego Blas, Stefan Floerchinger, Mathias Garny, Nikolaos Tetradis and Urs Achim Wiedemann |
E-Jahr: | 2015 |
Jahr: | 30 November 2015 |
Umfang: | 30 S. |
Fussnoten: | Gesehen am 24.11.2017 |
Titel Quelle: | Enthalten in: Journal of cosmology and astroparticle physics |
Ort Quelle: | London : IOP, 2003 |
Jahr Quelle: | 2015 |
Band/Heft Quelle: | (2015), 11, Artikel-ID 049, Seite 1-30 |
ISSN Quelle: | 1475-7516 |
Abstract: | Cosmological perturbations of sufficiently long wavelength admit a fluid dynamic description. We consider modes with wavevectors below a scale k m for which the dynamics is only mildly non-linear. The leading effect of modes above that scale can be accounted for by effective non-equilibrium viscosity and pressure terms. For mildly non-linear scales, these mainly arise from momentum transport within the ideal and cold but inhomogeneous fluid, while momentum transport due to more microscopic degrees of freedom is suppressed. As a consequence, concrete expressions with no free parameters, except the matching scale k m , can be derived from matching evolution equations to standard cosmological perturbation theory. Two-loop calculations of the matter power spectrum in the viscous theory lead to excellent agreement with N -body simulations up to scales k=0.2 h /Mpc. The convergence properties in the ultraviolet are better than for standard perturbation theory and the results are robust with respect to variations of the matching scale. |
DOI: | doi:10.1088/1475-7516/2015/11/049 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: http://dx.doi.org/10.1088/1475-7516/2015/11/049 |
| Volltext: http://stacks.iop.org/1475-7516/2015/i=11/a=049 |
| DOI: https://doi.org/10.1088/1475-7516/2015/11/049 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1565711203 |
Verknüpfungen: | → Zeitschrift |
Large scale structure from viscous dark matter / Blas, Diego [VerfasserIn]; 30 November 2015 (Online-Ressource)
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