Oral Presentation

Black hole accretion winds

Author(s): Feng Yuan (SHAO)

Presenter: Feng Yuan (Shanghai Astronomical Observatory)

Black hole hot accretion flows are perhaps operating in the nuclei of most of the galaxies in our universe. In this talk, I will review one of the most important progresses in recent years in this field, which is about the production of wind. The progresses are mainly attributed to the rapid development of numerical simulations of accretion flows, combined with the observations of Sgr A*, the supermassive black hole in the Galactice center. The following topics will be covered: theoretically why we believe strong winds exist; where and how they are produced and accelerated; what are their main properties such as mass flux and velocity; the comparison of the properties between wind and jet; the main observational evidences for wind, mainly from Sgr A*; and one observational manifestation of the interaction between wind and interstellar medium, namely the formation of the Fermi bubbles in the Galactic center.