The impact of feedback and cosmology on Cosmic Infrared Background cross-correlations
Abstract
We study the evolution and clustering properties of the star formation rate density (SFR) ρSFR in the FLAMINGO suite of hydrodynamical simulations, with the aim of exploring the possibility of constraining AGN and stellar feedback prescription, as well as the effect of cosmology, using cross-correlations between the Cosmic Infrared Background (CIB) and other tracers of the large-scale structure. Specifically, we consider tomographic measurements of the bias-weighted SFR-density ⟨ bρSFR⟩, as well as cross-correlations between the CIB and cosmic shear as a probe of the ρSFR-matter correlation. Most of the FLAMINGO models calibrated against the z=0 galaxy stellar mass function (SMF) yield similar predictions for the distribution and clustering of star-forming systems, and thus it is difficult to derive clean conclusions regarding the impact of AGN feedback or cosmology on CIB statistics. However, we show that current measurements of ⟨ bρSFR⟩, as well as CIB-shear cross-correlations clearly disfavour models with strong stellar feedback, as well as simulations with strong kinetic (jet-driven) AGN feedback, even under the fiducial SMF calibration. This study demonstrates the potential of CIB cross-correlations to study aspects of the physics of star and galaxy formation in a cosmological setting.
Related
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BibTeX
@misc{maleubre2026impact,
title = {{The impact of feedback and cosmology on Cosmic Infrared Background cross-correlations}},
author = {Sara Maleubre and David Alonso and Reggie Dunsdon and Adrien La Posta and Amy Wayland and Joop Schaye},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.08436},
eprint = {2610.08436},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.08436},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - The impact of feedback and cosmology on Cosmic Infrared Background cross-correlations
AU - Sara Maleubre
AU - David Alonso
AU - Reggie Dunsdon
AU - Adrien La Posta
AU - Amy Wayland
AU - Joop Schaye
PY - 2026
DA - 2026/10/06
PB - arXiv
DO - 10.48550/arxiv.2610.08436
UR - https://arxiv.org/abs/2610.08436
AB - We study the evolution and clustering properties of the star formation rate density (SFR) ρ_SFR in the FLAMINGO suite of hydrodynamical simulations, with the aim of exploring the possibility of constraining AGN and stellar feedback prescription, as well as the effect of cosmology, using cross-correlations between the Cosmic Infrared Background (CIB) and other tracers of the large-scale structure. Specifically, we consider tomographic measurements of the bias-weighted SFR-density ⟨ bρ_SFR⟩, as well as cross-correlations between the CIB and cosmic shear as a probe of the ρ_SFR-matter correlation. Most of the FLAMINGO models calibrated against the z=0 galaxy stellar mass function (SMF) yield similar predictions for the distribution and clustering of star-forming systems, and thus it is difficult to derive clean conclusions regarding the impact of AGN feedback or cosmology on CIB statistics. However, we show that current measurements of ⟨ bρ_SFR⟩, as well as CIB-shear cross-correlations clearly disfavour models with strong stellar feedback, as well as simulations with strong kinetic (jet-driven) AGN feedback, even under the fiducial SMF calibration. This study demonstrates the potential of CIB cross-correlations to study aspects of the physics of star and galaxy formation in a cosmological setting.
ER -