Nonlinear matter spectra in coupled quintessence
We consider cosmologies in which a dark-energy scalar field interacts with cold dark matter. The growth of perturbations is followed beyond the linear level by means of the time-renormalization-group method, which is extended to describe a multicomponent matter sector. Even in the absence of the ext...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
28 July 2010
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2010, Volume: 82, Issue: 2, Pages: 1-14 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.82.023528 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.82.023528 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.82.023528 
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| Author Notes: | F. Saracco, M. Pietroni, N. Tetradis, V. Pettorino, and G. Robbers |
| Summary: | We consider cosmologies in which a dark-energy scalar field interacts with cold dark matter. The growth of perturbations is followed beyond the linear level by means of the time-renormalization-group method, which is extended to describe a multicomponent matter sector. Even in the absence of the extra interaction, a scale-dependent bias is generated as a consequence of the different initial conditions for baryons and dark matter after decoupling. The effect is enhanced significantly by the extra coupling and can be at the 2%-3% level in the range of scales of baryonic acoustic oscillations. We compare our results with N-body simulations, finding very good agreement. |
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| Item Description: | Gesehen am 07.08.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.82.023528 |