Coupled Quintessence and CMB - INSPIRE

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Coupled Quintessence and CMB

Seokcheon Lee
(
- Taiwan, Inst. Phys.
)

Apr, 2006

10 pages

Part of Gravitation and astrophysics. Proceedings, 7th Asia-Pacific International Conference on the occasion of the 90th year of general relativity, ICGA7, Chungli, Taiwan, November 23-26, 2005, 69-78

Contribution to:

7th Asia-Pacific International Conference on Gravitation and Astrophysics (ICGA7 2005), 69-78

e-Print:

astro-ph/0604602 [astro-ph]

View in:

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Abstract: (arXiv)

We revise the stability of the tracking solutions and briefly review the potentials of quintessence models. We discuss the evolution of linear perturbations for

V(\phi) = V_{0} \exp(\lambda \phi^2/2)

potential in which the scalar field is non-minimally coupled to cold dark matter. We consider the effects of this coupling on both cosmic microwave background temperature anisotropies and matter perturbations. We find that the phenomenology of this model is consistent with current observations up to the coupling power

n_{c} \leq 0.01

while adopting the current parameters measured by WMAP,

\Omega_{\phi}^{(0)}=0.76

,

\Omega_{cdm}^{(0)}=0.191

,

\Omega_{b}^{(0)}=0.049

, and

h=0.70

. Upcoming cosmic microwave background observations continuing to focus on resolving the higher peaks may put strong constraints on the strength of the coupling.

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