Non-linear couplings,from the early to the late time universe |
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Institution: | 1. CEA & CNRS, UMR 3681, Institut de physique théorique, 91191 Gif-sur-Yvette, France;2. Sorbonne Universités, UPMC Université Paris-6 & CNRS, UMR 7095, Institut d''astrophysique de Paris, 98 bis bd Arago, 75014 Paris, France |
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Abstract: | Deciphering the mechanisms at play in the formation and evolution of the large-scale structure of the universe is part of the scientific goals of many projects of observational cosmology. In particular, large-scale structure observations can be used to infer mode-coupling effects, whether they come from the physics of the early universe or from its late time evolution. Specificities of such couplings are presented, noting that in principle they can be directly detected through bispectra of the cosmic microwave background temperature anisotropies or density in the local universe. The existence of such couplings have however more far-reaching consequences for the growth of the structure. Those are sketched as well as their possible observational impacts. |
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Keywords: | Cosmology Gravitation Large-scale structure Non-linear couplings Cosmologie Gravitation Structure à grande échelle Couplages non linéaires |
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