Saracco, Fabio and Pietroni, M. and Tetradis, N. and Pettorino, V. and Robbers, G. Nonlinear matter spectra in coupled quintessence. Physical Review D, 82. 023528. ISSN 1550-7998 (2010)
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Abstract
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.
| Item Type: | Article |
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| Identification Number: | 10.1103/PhysRevD.82.023528 |
| Subjects: | Q Science > QC Physics |
| Research Area: | Economics and Institutional Change |
| Depositing User: | Caterina Tangheroni |
| Date Deposited: | 16 Nov 2015 15:47 |
| Last Modified: | 16 Nov 2015 15:47 |
| URI: | http://eprints.imtlucca.it/id/eprint/2905 |
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