Publication : t14/243
Anomalous coupling of the small-scale structures to the large-scale gravitational growth
Taruya A. (Yukawa Institute for Theoretical Physics Kyoto University (YITP), Kyoto 606-8502, JAPAN)Bernardeau F. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Nishimichi Takahiro (IAP, 98 bis, boulevard Arago, 75014 Paris, France)
Abstract:Année de publication : 2014
We present detailed simulation measurement of the nonlinear response of the power spectrum to small variations in the linear counterpart in the context of cosmological large-scale structure formation. While the mode-coupling structure can be explained to a large extent with the standard perturbation theory, we show that the coupling of the short-wave modes are however significantly damped away making them contributing only weakly to the growth of long-wave modes. This is the first time such an effect is measured. It is of crucial importance for the use of large-scale cosmological data as probes of fundamental cosmological or physical parameters.
Preprint : arXiv:1411.2970
Langue : Anglais
Fichier(s) à télécharger :
publi.pdf
