Structure formation in a Dirac-Milne universe: comparison with the standard cosmological model - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review D Année : 2020

Structure formation in a Dirac-Milne universe: comparison with the standard cosmological model

Résumé

The presence of complex hierarchical gravitational structures is one of the main features of the observed universe. Here, structure formation is studied both for the standard (ΛCDM) cosmological model and for the Dirac-Milne universe, a matter-antimatter symmetric universe that was recently proposed as an alternative “coasting” cosmological scenario. One-dimensional numerical simulations reveal the analogies and differences between the two models. Although structure formation is faster in the Dirac-Milne universe, both models predict that it ends shortly before the present epoch, at cosmological redshift z≈3 for the Dirac-Milne cosmology, and at z≈0.5 for the ΛCDM universe. The present results suggest that the matter power spectrum observed by the Sloan Digital Sky Survey might be entirely due to the nonlinear evolution of matter and antimatter domains of relatively small initial dimensions, of the order of a few tens of parsecs comoving at cosmological redshift z=1080.

Mots clés

Fichier principal
Vignette du fichier
PhysRevD.102.103518.pdf (872.86 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-02999626 , version 1 (28-06-2021)

Identifiants

Citer

Giovanni Manfredi, Jean-Louis Rouet, Bruce N. Miller, Gabriel Chardin. Structure formation in a Dirac-Milne universe: comparison with the standard cosmological model. Physical Review D, 2020, 102 (10), pp.103518. ⟨10.1103/PhysRevD.102.103518⟩. ⟨hal-02999626⟩
171 Consultations
133 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More