Stability Analysis in Tachyonic Potential Chameleon cosmology
  We study general properties of attractors for tachyonic potential chameleon scalar-field model which possess cosmological scaling solutions. An analytic formulation is given to obtain fixed points with a discussion on their stability. The model predicts a dynamical equation of state parameter with phantom crossing behavior for an accelerating universe. We constrain the parameters of the model by best fitting with the recent data-sets from supernovae and simulated data points for redshift drift experiment generated by Monte Carlo simulations. 
H. Farajollahi, A. Salehi, F. Tayebi, A. Ravanpak
gr-qc