Astroplasmas Seminar

Fridays at 12:30pm, Dome Room, Peyton Hall

Next seminar

Friday, October 15th 2021, 12.30pm

Faster Accretion Disk Simulations for Analysis of Black Hole Images

Ben Prather (University of Illinois)

Abstract: The EHT Collaboration (EHTC) has now published high resolution images of total and polarized emission from the black hole M87. The interpretation of these and forthcoming images by the EHTC makes heavy use of libraries of simulations modeling the observed systems, conducted using general relativistic magnetohydrodynamics (GRMHD) and imaged via general relativistic radiative transfer (GRRT). While the imaging process is well-understood, there is a clear need for a broader array of longer GRMHD simulations as observational data accumulates. I will present a new performance-portable GRMHD code designed to address this need, KHARMA (Kokkos-based High-Accuracy Relativistic Magnetohydrodynamics, soon to have Adaptive mesh refinement). KHARMA leverages the Kokkos performance portability library to generate efficient code for different computer architectures, and uses the new Parthenon Eulerian simulation framework for many other code functions, keeping KHARMA simple while also fast, featureful, and extensible. I will end by presenting some future projects making use of this new capability.

Scheduled seminars (September to December 2021)

24 Sept: Jens Mahlmann (Princeton University)

01 Oct: Bart Ripperda (Center for Computational Astrophysics and Princeton University)

08 Oct: David Hosking (Oxford University)

15 Oct: Ben Prather (University of Illinois)

22 Oct: Tamar Faran (The Hebrew University of Jerusalem) and Luciano Combi (Instituto Argentino de RadioastronomĂ­a)

29 Oct: Aaron Tram (Columbia University) and Itai Linial (The Hebrew University of Jerusalem)

05 Nov: Lorenzo Perrone (Cambridge University)

19 Nov: Fabio Bacchini (University of Colorado)

03 Dec: Elias Most (Institute of Advanced Studies and Princeton University)

10 Dec: Elizabeth Tolman (Institute of Advanced Studies)