Title：EHT movies and fluctuations in astrophysical disks

Speaker：Charles F. Gammie （University of Illinois at Urbana-Champaign）

Time：10:30 am Dec. 14th (Thursday)

Tencent Meeting：576-157-8290 password: 6360

Location: Lecture Hall, 3rd floor

Abstract：

The Event Horizon Telescope will soon produce movies of the accretion flows in M87* and Sgr A*.  Fluid models of these sources suggest that the movies will show spiral features with pattern speeds that are small compared to the orbital speed of the emitting plasma.  I will describe the fluid model predictions, a model of fluctuations in accretion flows based on Gaussian random fields, and the beginnings of a model that incorporates both dynamics and statistical features.Portrait of a Black Hole.

CV：

Charles F. Gammie is the Ikenberry Chair in Astronomy and in Physics at the University of Illinois at Urbana-Champaign. Prof. Gammie is a theoretical and computational astrophysicist with interests in black holes, formation of planets, formation of stars, and turbulence. He is particularly interested in understanding how new computing capabilities can help solve new (and old) astronomical problems. Prof. Gammie has a BSc in Mathematics from Yale and a PhD in Astrophysics from Princeton. He held research positions at Virginia, Harvard, and Cambridge before joining the Illinois faculty in 1999, and has since held visiting positions at the Institute for Advanced Study, the Max Planck Institute for Astrophysics, Oxford, the Flatiron Institute, and the Perimeter Institute. Prof. Gammie is currently working on the theory of Event Horizon Telescope images of black holes, and on the formation of the Earth's Moon.