A Jet-bases Emission Model of the EHT2017 Image of M87*

We carry out general relativistic ray-tracing radiative-transfer calculations to study whether a localized emission from $e^{\pm}$ plasma rings created at the stagnation surface in jet funnel, which we refer as rings, can explain ring image of M87 observed by Event Horizon Telescope (EHT) 2017. The resultant images consist direct and formed via strong deflection black-hole (BH) gravity, "quasi photon-ring". For model with BH spin $a_* = 0.99$, counter-jet quasi photon-ring are almost coincident photon diameter $\sim 40 \mu{\rm as}$, while approaching shows small ring-image inside them. synthetic observation assuming EHT 2017 array is consistent that M87, because bit sparse detect inner image. This indicates might contain important feature bases addition ring. find forthcoming observations resolve stagnation-ring may enable us explore plasma-injection mechanism into funnel.