Quintessence and scalar dark matter in the Universe

Abstract

Continuing with previous works, we present a cosmological model in which dark\nmatter and dark energy are modeled by scalar fields $\\Phi $ and $\\Psi$,\nrespectively, endowed with the scalar potentials $V(\\Phi)=V_{o}[ \\cosh\n{(\\lambda \\sqrt{\\kappa_{o}}\\Phi)}-1] $ and $\\tilde{V}(\\Psi)=\\tilde{V_{o}}[\n\\sinh {(\\alpha \\sqrt{\\kappa_{o}}\\Psi)}] ^{\\beta}$. This model contains 95% of\nscalar field. We obtain that the scalar dark matter mass is $m_{\\Phi}\\sim\n10^{-26}eV.$ The solution obtained allows us to recover the success of the\nstandard CDM. The implications on the formation of structure are reviewed. We\nobtain that the minimal cutoff radio for this model is $r_{c}\\sim 1.2 kpc.$\n