A Message from the Horizon Scale by EHT: Deciphering Observational Signatures of Sgr A* and M87*

This seminar presents "A Message from the Horizon Scale by EHT: Deciphering Observational Signatures of Sgr A* and M87*" by Richard Anantua from the University of Texas at San Antonio. Explore how the Event Horizon Telescope has revolutionized astronomy with unprecedented high-resolution imaging of supermassive black holes, providing direct observations of plasma astrophysics in strong gravity environments. Learn about the comparative analysis between the first black hole images from M87 and our Galactic Center's Sagittarius A*, examining how theoretical models with varying plasma magnetization, emission processes, and black hole spin reveal both similarities and differences between actual astrophysical sources and general relativistic magnetohydrodynamics (GRMHD) simulations. Discover the four quasi-stationary types of models for Sagittarius A* based on turbulent heating and energy equipartition deviations, and understand how positron incorporation into simulations reveals distinct polarization signatures between different accretion modes. Gain insights into how this comprehensive approach to modeling black hole systems with electrons, positrons, and protons creates a powerful tool for analyzing the composition of jet/accretion flow/black hole systems and sets the foundation for time-dependent analysis in black hole movies.