期刊
PHYSICAL REVIEW D
卷 82, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.82.023528
关键词
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资金
- EU [MRTN-CT-2006-035863]
- ITN network [PITN-GA-2009-237920]
- Alexander von Humboldt Foundation
- Federal Ministry of Economics and Technology [50-OP-0901]
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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