SEMINAR OF THE DEPARTMENT OF ASTRONOMY
Simulating AGN Across the Scales: From Accretion Discs to Galactic Feedback
a talk by Ivan Carlos de Almeida (Max Planck Institute for Astronomy)
Abstract:
Supermassive black holes (SMBHs) at the centers of galaxies, when accreting matter, power active galactic nuclei (AGN), releasing vast amounts of energy into their surroundings. This energy is often carried by outflows, both winds and relativistic jets, which can interact with the host galaxy. AGN-driven outflows are thought to play a key role in galaxy evolution, yet many aspects of this interaction are still not fully understood.
In this talk, I will present my recent efforts to model AGN feedback across scales using numerical simulations. I will discuss how GRMHD simulations of low-accretion rate flows can inform the launching conditions of outflows near the event horizon, and how these can be embedded into larger scale simulations to study their propagation and impact on the multiphase interstellar medium.
These simulations allow us to quantify key feedback properties, such as mass outflow rates and kinetic energy coupling, and explore their implications for galaxy evolution and their related observational signatures. I will highlight my most recent ongoing efforts to build a physically motivated, multiscale framework for connecting SMBH accretion physics to the large-scale evolution of galaxies.
Short-Bio:
Ivan Almeida is a postdoctoral researcher at the Max Planck Institute for Astronomy, where he investigates some of the universe’s most energetic phenomena: accreting supermassive black holes and AGN feedback. His work combines theoretical modeling and numerical simulations to explore how black holes influence galaxy evolution across cosmic time. He holds a PhD in astrophysics from the University of São Paulo (2023) and previously held a postdoctoral position at Newcastle University (2023–2025).
Google Meet: https://meet.google.com/pcw-gmem-jyi
Link da transmissão: https://www.youtube.com/c/AstronomiaIAGUSP/live