Accretion models for LLAGNs: Model Parameter Estimation with M87 as an example

The Event Horizon Telescope (EHT) provides a unique opportunity to probe the physics of supermassive black holes through Very Large Baseline Interferometry (VLBI), such as the existence of the event horizon, the accretion processes as well as jet formation in low luminosity AGN (LLAGN). We build a theoretical model which includes an advection-dominated accretion flow (ADAF) and a simple radio jet outflow. The predicted spectral energy distribution (SED) of this model can be compared to observations to get the best estimates of the model parameters. Additionally, the model-predicted radial emission profiles at different frequency bands, can be used to predict whether the inflow can be resolved by the EHT or other telescopes. In this proceeding we demonstrate this process using M87 as an example.