Nonlinear matter spectra in coupled quintessence
| Autor: | Georg Robbers, M. Pietroni, Nikolaos Tetradis, V. Pettorino, Fabio Saracco |
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| Přispěvatelé: | Saracco, F, Pietroni, M, Tetradis, N, Pettorino, V, Robbers, G |
| Rok vydání: | 2010 |
| Předmět: |
Astrophysics and Astronomy
Nuclear and High Energy Physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) Cold dark matter Dark matter Scalar field dark matter FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics power spectra 7. Clean energy 01 natural sciences large-scale structure High Energy Physics - Phenomenology (hep-ph) Quantum mechanics 0103 physical sciences 010303 astronomy & astrophysics Physics 010308 nuclear & particles physics dynamics Decoupling (cosmology) large-n expansion High Energy Physics - Phenomenology dark-matter Quantum electrodynamics Dark energy Baryon acoustic oscillations Dark fluid energy Astrophysics - Cosmology and Nongalactic Astrophysics Quintessence |
| Zdroj: | Phys. Rev. D, (2010) pp. 023528 |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.82.023528 |
| Popis: | 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 multi-component 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 percent level in the range of scales of baryonic acoustic oscillations. We compare our results with N-body simulations, finding very good agreement. Comment: 20 pages, 6 figures, typo corrected |
| Databáze: | OpenAIRE |
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