報告摘要：Hot accretion flow is widely believed to be essential for our understanding of low-luminosity AGNs (LLAGNs) and black hole X-ray binaries (BHBs) in their hard (and quiescent) state. In this talk, I will first review the current status of accretion theory. The progresses viewed from fundamental physics perspective are angular momentum transport, turbulent heating mechanism, and outflow/wind; from accretion mode perspective include magnetic-arrested disk (MAD) and high-\dot{M} hot accretion flow. Applications of these progresses in LLAGNs and BHBs will also be addressed. More specificly, I will use both the index-lumonosity correlation and the radio-X-ray correlation as tools to probe the change in accretion mode. I will also discuss the radiative properties (efficiency and SED) of MAD.

主講人簡介：Fu-Guo Xie got his batcher degree from University of Science and Technology of China (USTC) in 2004, and got his phd from Shanghai Astronomical Observatory in 2009. He then spent two-years in KIAA-PKU as a postdoc, and from 2011 he worked in Shanghai Astronomical Observatory. He is now the professor and associated head of astrophysics division of the institute. Dr. Fu-Guo Xie mostly worked on theoretical investigations of black hole accretion, and recently also on radio morphology at galaxy-cluster scale. He is also the outstanding member of the Youth Innovation Promotion Association of CAS.