Microlensing predictions: impact of Galactic disc dynamical models

Galactic model plays an important role in the microlensing field, not only for analyses of individual events but also statistics ensemble events. However, models used field varies, and some are unrealistically simplified. Here we tested three disc dynamic models, first is a simple standard that was widely this whereas other two consider radial dependence velocity dispersion, last model, asymmetric drift. We found typical lens mass $M_{\rm L}=0.5M_{\odot}$, new dynamical predict $\sim16\%$ or $\sim5\%$ less long-timescale (e.g., timescale $t_{\rm E}>300$ days) $\sim 5\%$ 3.5\%$ more short-timescale ($t_{\rm E}<3$ than model. Moreover, event rate as function Einstein radius $\theta_{\rm E}$ parallax $\pi_{\rm shows (a few percent). The have impact on total rate. This result will to degree affect Bayesian analysis events, overall, small. still recommend modelers should be careful when choosing especially statistical works involving large number Additionally, find asymptotic power-law behaviors both distributions, provide understand them.