Oral Presentation

Semi-analytical GRMHD Model and Its Synchrotron Radiation Image on Horizon Scale

Hung-Yi Pu(ASIAA), Masanori Nakamura (ASIAA), Kouichi Hirotani (ASIAA), Ziri Younsi (ITP), Yosuke Mizuno (ITP), Kinwah Wu (UCL), and Keiichi Asada (ASIAA)

A semi-analytical scheme is presented to study general relativistic magnetohydrodynamic (GRMHD) flow along a black hole-threading field line, under the magnetic dominated case. The model properly describes how jets are launched at the expense of black hole rotational energy. We further consider general relativistic radiative transfer (GRRT) to compute the jet image on horizon scale. The study is important for future sub-mm VLBI observations with a resolution (~micro arcsec) high enough to resolve the event horizon of the SMBH at the center of M87. Such high resolution observation is the goal of the ongoing Greenland Telescope Project in ASIAA VLBI group, in collaborating with Smithsonian Astrophysical Observatory, MIT Haystack Observatory, & National Radio Astronomy Observatory.