Fig. 2
Variation of the ratio η = (∂Φ1/∂R)/(∂Φ0/∂R) as a function of normalized Galactic radius R/R0 and along the azimuth ϕ = 90°, for the potential model of Junqueira et al. (2013, red dashed curve) and for the potential model with updated parameters adopted in the present work (blue dashed curve). Φ0 and Φ1 are the unperturbed and perturbed parts of the Galactic potential, respectively.
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