Effective description of dark matter as a viscous fluid
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 appropri...
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| Main Author: | |
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| Format: | Chapter/Article Conference Paper |
| Language: | English |
| Published: |
28 October 2016
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| In: |
5th International Conference on New Frontiers in Physics
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| DOI: | 10.1051/epjconf/201612503018 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1051/epjconf/201612503018 Verlag, kostenfrei, Volltext: https://www.epj-conferences.org/articles/epjconf/abs/2016/20/epjconf_quark2016_03018/epjconf_quark2016_03018.html |
| Author Notes: | Stefan Floerchinger, Mathias Garny, Nikolaos Tetradis, and Urs Achim Wiedemann |
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| 520 | |a 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. | ||
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