Speaker:　 Prof. James Moran　　　　　　　　　　　　
　  Affiliation:  Harvard-Smithsonian Center for Astrophysics
　  Title: Dinnertime for SgrA* (The Black Hole in the Center of OUR Galaxy)
　  Time: 10am, (Thursday) August 16, 2012
　  Location:  Middle Conference Room, 3rd floor

Abstract:　
　  I will describe the developing efforts to image the black hole in the center of our galaxy at 230 GHz with Very Long Baseline Interferometry (VLBI). The VLBI Array is called
　  the Event Horizon Telescope (EHT). At 230 GHz the interstellar scattering and the optical depth are sufficiently small that the immediate vicinity of the black hole can be discerned. The size of this image has a diameter of about 37 microarcseconds or about 4 Schwarzschild radii. Image quality should improve rapidly in the coming years as the EHT is formed. We are at a phase of development similar to that of imaging Cygnus A in the early 1950s. I will also describe the imagining of the base of the jet driven by the black hole in M87 and of another AGN, 1924-293.