Quantifying the impact of AGN feedback on the large-scale matter distribution using two- and three-point statistics

Saha, Bipradeep; Bose, Sownak

Abstract

Feedback from active galactic nuclei (AGN) plays a critical role in shaping the matter distribution on scales comparable to and larger than individual galaxies. Upcoming surveys such as Euclid and Legacy Survey of Space and Time aim to precisely quantify the matter distribution on cosmological scales, making a detailed understanding of AGN feedback effects essential. Hydrodynamical simulations provide an informative framework for studying these effects, in particular by allowing us to vary the parameters that determine the strength of these feedback processes and, consequently, to predict their corresponding impact on the large-scale matter distribution. We use the EAGLE simulations to explore how changes in subgrid viscosity and AGN heating temperature affect the matter distribution, quantified via two- and three-point correlation functions, as well as higher order cumulants of the matter distribution. We find that varying viscosity has a small impact ($\approx 10~{{\ \rm per\ cent}}$) on scales larger than $1\,{\it h}^{-1}$ Mpc, while changes to the AGN heating temperature lead to substantial differences, with up to 70 per cent variation in gas clustering on small scales ($\lesssim 1\,{\it h}^{-1}$ Mpc). By examining the suppression of the power spectrum as a function of time, we identify the redshift range $z = 1.5{-}1$ as a key epoch where AGN feedback begins to dominate in these simulations. The three-point function provides complementary insight to the more familiar two-point statistics, and shows more pronounced variations between models on the scale of individual haloes. On the other hand, we find that effects on even larger scales are largely comparable.

Citation

Saha, B., & Bose, S. (2024). Quantifying the impact of AGN feedback on the large-scale matter distribution using two- and three-point statistics. Monthly Notices of the Royal Astronomical Society, 534(4), 3876-3892. https://doi.org/10.1093/mnras/stae2312

• Journal Article Type: Article
• Acceptance Date: Oct 3, 2024
• Online Publication Date: Oct 8, 2024
• Publication Date: 2024-11
• Deposit Date: Nov 5, 2024
• Publicly Available Date: Nov 5, 2024
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Royal Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 534
• Issue: 4
• Pages: 3876-3892
• DOI: https://doi.org/10.1093/mnras/stae2312
• Public URL: https://durham-repository.worktribe.com/output/3045056