A power-law coupled three-form dark energy model

Abstract

Abstract We consider a field theory model of coupled dark energy which treats dark energy as a three-form field and dark matter as a spinor field. By assuming the effective mass of dark matter as a power-law function of the three-form field and neglecting the potential term of dark energy, we obtain three solutions of the autonomous system of evolution equations, including a de Sitter attractor, a tracking solution and an approximate solution. To understand the strength of the coupling, we confront the model with the latest Type Ia Supernova, Baryon Acoustic Oscillations and Cosmic Microwave Background radiation observations, with the conclusion that the combination of these three databases marginalized over the present dark matter density parameter $$\Omega _{m0}$$ Ωm0 and the present three-form field $$\kappa X_{0}$$ κX0 gives stringent constraints on the coupling constant, $$-\,0.017< \lambda <0.047$$ -0.017<λ<0.047 ($$2\sigma $$ 2σ confidence level), by which we present the model’s applicable parameter range.