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arXiv:astro-ph/0004196 (astro-ph)
[Submitted on 14 Apr 2000 (v1), last revised 12 Jun 2000 (this version, v2)]

Title:Observational constraints upon quintessence models arising from moduli fields

Authors:S.C.C. Ng
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Abstract: 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^{sqrt{2} kappa phi}). 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^{-lambda kappa phi}.
Comments: 6 pages, RevTeX, 9 figures, corrected some typos, accepted for publication in Phys. Lett. B
Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph)
Report number: ADP-00-19/M92
Cite as: arXiv:astro-ph/0004196
  (or arXiv:astro-ph/0004196v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0004196
Journal reference: Phys.Lett. B485 (2000) 1-8
Related DOI: https://doi.org/10.1016/S0370-2693%2800%2900691-2

Submission history

From: Cindy Ng [view email]
[v1] Fri, 14 Apr 2000 06:36:05 UTC (70 KB)
[v2] Mon, 12 Jun 2000 08:14:54 UTC (77 KB)
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