Simulating the various states of black hole accretion - Oliver Porth - 21/11/2022

21/11/2022 Speaker: Oliver Porth (University of Amsterdam) Title: Simulating the various states of black hole accretion Abstract: I will discuss recent simulations of black hole accretion carried out in my group in collaboration with the BHAC and H-AMR teams. I will cover modeling of low luminosity EHT sources and simulations of high luminosity thin disks with applications to X-ray binaries.  In particular the latter have achieved a high level of sophistication in recent years, with the topics of magnetic disk truncation, two-temperature thermodynamics and warped and torn disks being under investigation. As a technical example, I plan to discus designing effective grids for the simulations at the example of cartesian and spherical meshes. Related publications: Disk Tearing Leads to Low and High Frequency Quasi Periodic Oscillations in a GRMHD Simulation of a Thin Accretion Disk https://ui.adsabs.harvard.edu/abs/202... Formation of Magnetically Truncated Accretion Disks in 3D Radiation-transport Two-temperature GRMHD Simulations https://ui.adsabs.harvard.edu/abs/202... Nozzle Shocks, Disk Tearing and Streamers Drive Rapid Accretion in 3D GRMHD Simulations of Warped Thin Disks https://ui.adsabs.harvard.edu/abs/202... Impact of non-thermal particles on the spectral and structural properties of M87 https://ui.adsabs.harvard.edu/abs/202...