The Circumgalactic Medium from the CAMELS Simulations: Forecasting Constraints on Feedback Processes from Future Sunyaev–Zeldovich Observations
Year: 2022
Type: article
Abstract: It is important to understand the cycle of baryons through the circumgalactic medium (CGM) in the context of galaxy formation and evolution. In this study, we forecast constraints on the feedback processes heating the CGM with current and future Sunyaev–Zeldovich (SZ) observations. To constrain these processes, we use a suite of cosmological simulations, the Cosmology and Astrophysics with MachinE Learning Simulations (CAMELS). CAMELS varies four different feedback parameters of two previously existing hydrodynamical simulations, IllustrisTNG and SIMBA. We capture the dependences of SZ radial profiles on these feedback parameters with an emulator, calculate their derivatives, and forecast future constraints on these feedback parameters from upcoming experiments. We find that for a galaxy sample similar to what would be obtained with the Dark Energy Spectroscopic Instrument at the Simons Observatory, all four feedback parameters can be constrained (some within the 10% level), indicating that future observations will be able to further restrict the parameter space for these subgrid models. Given the modeled galaxy sample and forecasted errors in this work, we find that the inner SZ profiles contribute more to the constraining power than the outer profiles. Finally, we find that, despite the wide range of parameter variation in active galactic feedback in the CAMELS simulation suite, we cannot reproduce the thermal SZ signal of galaxies selected by the Baryon Oscillation Spectroscopic Survey as measured by the Atacama Cosmology Telescope.
Source: The Astrophysical Journal
Institutions: Cornell University, Yale University, Center for Astrophysics Harvard & Smithsonian, ETH Zurich, Institute for Particle Physics and Astrophysics, Princeton University, Flatiron Institute, Centre National de la Recherche Scientifique, Observatoire astronomique de Strasbourg, Université de Strasbourg, University of Connecticut, Columbia University, Royal Observatory, South African Astronomical Observatory, University of the Western Cape, University of Edinburgh, Massachusetts Institute of Technology
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Awards: G1777248781, Observations to Constrain the Origins of Hot Gas Between Galaxies and Clusters of Galaxies Across Cosmic Time, The Interscale Galactic Nuclei Simulations (IGNIS): Hyper-refined black hole growth and feedback in cosmological environments, Turning up the Heat: Using Ram Pressure Stripping in Clusters to Understand Star Formation in Extreme Conditions, Collaborative Research:Framework:Software:NSCI:Enzo for the Exascale Era (Enzo-E), G6027933290, G6964998482, Collaborative Research: CDS&E: Cosmology and Astrophysics with MachinE Learning Simulations (CAMELS) to maximize the science return of next generation cosmological experiments
OpenAlex ID: W4226337154