Title: Theory and observations of hot accretion flows

Speaker: 谢富国 副研究员, 中国科学院上海天文台

Host: 马任意

Time: 14:30-16:30, Thursday, Nov 07, 2019

Location: Physics Building 552

Abstract: Hot accretion flow, conventionally named ADAF, has proven being successful in understanding low-luminosity AGNs and black hole X-ray binaries in their hard and intermediate states. In this talk, I will review (admittedly biased by my personal interest) its latest progresses, both theoretical and observational. I will selectively address several key results: 1) outflow, 2) electron turbulent heating, and 3) magnetic field accumulation (i.e. the so-called magnetically arrested disk). All these findings revise our understanding of not only the accretion theory itself, but also its impact on surrounding medium (e.g., in the form of AGN feedback). The two-phase regime, promising for our understanding of intermediate state in BH binaries, will also be addressed.