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Observational constraints upon quintessence models arise from moduli fields

S.C.Cindy Ng
(
- Adelaide U.
)

Apr, 2000

7 pages

Published in:

Phys.Lett.B 485 (2000) 1-8

e-Print:

astro-ph/0004196 [astro-ph]

DOI:

10.1016/S0370-2693(00)00691-2

Report number:

ADP-00-19-M92

View in:

ADS Abstract Service

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Abstract: (Elsevier)

We study observational constraints on cosmological models with a quintessence arising from moduli fields. The scalar field potential is given by a double exponential potential V=V 0 exp (−A e 2 κφ ) . After reviewing the properties of the solutions, from a dynamical systems phase space analysis, we consider the constraints on parameter values imposed by luminosity distances from the 60 Type IA supernovae published by Perlmutter et al., and also from gravitational lensing statistics of distant quasars. We also update the constraints on models with a single exponential potential V = V 0 e − λκφ .

Note:

6 pages, RevTeX, 9 figures, corrected some typos, accepted for publication in Phys. Lett. B Report-no: ADP-00-19/M92

98.80.Cq
95.35.+d
98.80.Es
quintessence
moduli
field theory: scalar
potential
phase space
critical phenomena
supernova

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