Deciphering Baryonic Feedback from Galaxy Clusters
Baryonic feedback and cosmic shear effects impacting the matter power spectrum in galaxy clusters are examined through hydrodynamical simulations, revealing varied predictions. This study extracts cluster profiles, suppresses matter power spectrum fit, and models with an emulator to address parameter precision limitations. Forecasts are made to anticipate developments in the field.
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Deciphering Baryonic Feedback from Galaxy Clusters Nihar Dalal, Chun-Hao To, Chris Hirata
Baryonic feedback & Cosmic Shear Baryonic effects cause a characteristic suppression in the matter power spectrum at scales k > 1 h/Mpc Hydrodynamical simulations vary considerably in their predictions for this suppression due to different implementations of baryonic physics Leads to scale cuts in cosmic shear that limit precision on parameters of interest To et al. 2024 (arXiv: 2402.00110) Doux et al. 2022 (arXiv: 2203.07128)
Model & Method Extract Cluster Profiles Suppress Matter Power Spectrum Fit DMB Model Noisy ACT Data 10 parameter Dark Matter + Baryon Model (S. Pandey et al. 2024) Forward Model with an emulator (Dalal et al. in prep)
