Speaker
Description
We present a comprehensive and uniform thermal Sunyaev-Zel’dovich (SZ) effect study of galaxy clusters in the Local Volume Complete Cluster Survey (LoVoCCS). As of 2025/26, LoVoCCS remains unique in having deep, individual 2D weak-lensing mass maps for the largest mass-complete sample of nearby clusters (0.03 < z < 0.12), well in advance of LSST/Vera Rubin 10-year results. Using Planck PR2 all-sky SZ y-maps, we derive thermal pressure profiles and integrated Compton-y parameters (Y500) for 72 LoVoCCS clusters. These SZ measurements complement ongoing archival X-ray analyses by improving constraints on intracluster medium thermodynamics in cluster outskirts. The SZ–LoVoCCS study provides a foundation for calibrating benchmark SZ scaling relations with individual weak-lensing masses and offers a direct observational test of how feedback shapes the thermal pressure of hot gas and affects large-scale structure.
This talk will also briefly highlight our ongoing effort to test a CLUMP-3D–inspired forward-modeling framework to jointly fit SZ, X-ray, and lensing maps of LoVoCCS clusters. We plan to leverage the multi-wavelength observations of LoVoCCS clusters to better constrain the 3D thermal pressure structure and quantify non-thermal pressure support. This approach will help link deviations from hydrostatic equilibrium to feedback signatures that extend from cluster cores to large-scale structure.