| Understanding galaxy evolution within the context of the cosmic web requires a detailed study of the circumgalactic medium (CGM) and its interactions with galaxies. I will present our latest findings on gas and galaxy co-evolution in several protocluster environments at the cosmic noon, using multiwavelength and wide-field spectrograph data from the KBSS and CARLA surveys. In the KBSS survey, we identified a significant galaxy overdensity (δgal = 6.3 ± 0.4) at z=2.3 and observed extended Lyα, HeII, and CIV emissions associated with a large concentration of AGN activity. KCWI observations reveal complex gas kinematics and morphology, indicating active feedback processes between galaxies and their environment. Moreover, the estimated star formation rates (SFR) from spectral energy distribution (SED) fitting suggest a suppression in star formation, below the typical main sequence at the cosmic noon. These findings highlight the dynamic interplay between diffuse media and the stellar and interstellar components of galaxies. In the CARLA survey, we investigated protoclusters at z=2.8 and z=2.0, both centered around radio-loud QSOs. At z=2.8, the morphology and kinematics of the Lyα halo suggest a biconical outflow driven by the QSO. In contrast, the z=2.0 protocluster, lacking a central Lyα halo, exhibits extended Lyα and HST F140W emissions linked to a violent disruption event, potentially associated with the formation of intracluster light (ICL). Future studies with state-of-the-art models and extensive statistical samples, enabled by upcoming facilities like the LSST and Euclid, are crucial for advancing our understanding of the key connection between large-scale structure and galaxy formation, especially the role of high-density AGN activity and feedback processes. This presentation will emphasize these findings and their implications for refining galaxy evolution theories. |
