MG13 - Talk detail |
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Participant |
Shandarin, Sergei | |||||||
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Institution |
University of Kansas - 1251 Wescoe Hall Drive #1082 - Lawrence - Kansas - USA | |||||||
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Session |
OC4 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
The phase-space structure of cold dark matter in the universe | |||||
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Abstract |
The talk introduces a new methodology for the analysis of cosmological N-body simulations along with a discussion of the results and implications for cosmology. In the Lambda CDM model the most of mass in the universe able to cluster is in a form of cold dark matter (CDM). The domain occupied by the CDM can be accurately described by a 3D sheet in 6D phase space. The phase space sheet (PSS) remains continuous and 3D during entire evolution of the cosmic web. A new method of the analysis of cosmological N-body simulations based on these properties of the PSS has been recently suggested. It allows to extract a wealth of new dynamic information about the evolution of the cosmic web that was absolutely inaccessible with previous approaches. The key facet of the method is the tessellation of the PSS by tetrahedra. Being self adaptive the tessellation remarkably boosts the spatial resolution of density and other fields compared to methods employed particles. The results reveal a rich morphology in the simulated universe that conventional methods has failed to detect. |
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