We determine the range of parameter space of an interacting quintessence (IQ) model that best fits the luminosity distance of type Ia supernovae data and the recent WMAP measurements of Cosmic Microwave Background temperature anisotropies. Models in which quintessence decays into dark matterprovide a clean explanation for the coincidence problem. We focus on cosmological models of zero spatial curvature. We show that if the dark energy (DE) decays into cold dark matter (CDM) at a rate that brings the ratio of matter to dark energy constant at late times, the supernovae data are not sufficient to constrain the interaction parameter. On the contrary, WMAP data constrain it to be smaller than c2 < 10−2 at the 3σ level. Accurate measurements of the Hubble constant and the dark energy density, independent of the CMB data, would support/disprove this set of models.
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19 June 2006
A CENTURY OF RELATIVITY PHYSICS: ERE 2005; XXVIII Spanish Relativity Meeting
6-10 September 2006
Oviedo, Asturias (Spain)
Research Article|
June 19 2006
Constraining dark energy interacting models with WMAP Available to Purchase
Germán Olivares;
Germán Olivares
*Departamento de Física, Universidad Autónoma de Barcelona, Spain
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Fernando Atrio‐Barandela;
Fernando Atrio‐Barandela
†Departamento de Física Teórica, Universidad de Salamanca, Spain
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Diego Pavón
Diego Pavón
*Departamento de Física, Universidad Autónoma de Barcelona, Spain
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Germán Olivares
st
Fernando Atrio‐Barandela
gger
Diego Pavón
st
*Departamento de Física, Universidad Autónoma de Barcelona, Spain
†Departamento de Física Teórica, Universidad de Salamanca, Spain
AIP Conf. Proc. 841, 550–553 (2006)
Citation
Germán Olivares, Fernando Atrio‐Barandela, Diego Pavón; Constraining dark energy interacting models with WMAP. AIP Conf. Proc. 19 June 2006; 841 (1): 550–553. https://doi.org/10.1063/1.2218234
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