TODAY: DGCE SIG Seminar, May 28, 2026

Cosmic Origins… Cosmic Origins Community TODAY: DGCE SIG Seminar, May… About CommunityExecutive Committee Science Groups Conferences Cosmic Pathfinders Early Career Workshop Opportunities Missions Studies News & Events Resources TODAY: Diffuse Gas Cosmic Ecosystems SIG Seminar 28 May 2026 May 28th, 2026 4:00pm ET The Effect of Various Physical Processes on Gas Flows in the CGM https://science.nasa.gov/astrophysics/programs/cosmic-origins/community/dgce-sig-seminar-28-may-2026 Speaker Freeke van de Voort, Cardiff University Abstract Feedback-driven outflows are vital for creating realistic galaxies, but feedback models implemented in cosmological simulations vary wildly. The circumgalactic medium (CGM) may be able to break degeneracies and constrain these models. However, there are other differences between simulation efforts, such as which physical processes are included and which numerical method is used. Without understanding their impact on the CGM, we will not be able to confidently constrain galaxy formation models. Using zoom-in cosmological simulations, I will discuss some of the physical and observable properties of the CGM. I will focus on non-thermal physical processes and how they impact the galactic ecosystem. The presence of magnetic fields and feedback from relativistic cosmic rays changes the flow of gas in the CGM, affecting the efficiency of outflows driven by stars or supermassive black holes as well as the turbulence-driven mixing in the CGM. This also affects our simulations’ predictions for neutral hydrogen and metal ions. I will show how these effects of magnetic fields and cosmic rays vary across a wide range in halo mass, from dwarf galaxies to galaxy groups. Briefly switching focus to a thermal process, I will show preliminary results from our work on thermal conduction in groups and clusters. News Straight to Your Inbox Subscribe to your community email news list We will never share your email address. Privacy Policy " /> --> Sign Up The post TODAY: DGCE SIG Seminar, May 28, 2026 appeared first on NASA Science.