000012645 001__ 12645 000012645 005__ 20240711110917.0 000012645 0247_ $$2doi$$a10.6082/uchicago.12645 000012645 037__ $$aTHESIS 000012645 037__ $$bDissertation 000012645 041__ $$aeng 000012645 245__ $$aNext-Generation Images of Galaxy Clusters at Millimeter Wavelengths 000012645 260__ $$bUniversity of Chicago 000012645 269__ $$a2024-08 000012645 336__ $$aDissertation 000012645 502__ $$bPh.D. 000012645 520__ $$aGalaxy clusters are the largest and most massive objects in the universe. Observing and studying them unlocks answers to broad cosmological questions, such as the matter content and its distribution in the universe, as well as more specific astrophysical topics regarding the nature of physics within the intracluster medium (ICM). One method to probe clusters is by observing them at millimeter wavelengths via the Sunyaev-Zeldovich (SZ) effect, which results from the interaction of hot electrons in the ICM with Cosmic Microwave Background (CMB) photons. To address expansive questions ranging from cosmological to astrophysical, clusters must be observed at angular scales from arcminutes down to arcseconds. This necessitates multiple instruments: a sensitive arcminute-resolution wide-field survey to discover clusters and provide high fidelity on arcminute scales; and an arcsecond-resolution instrument for efficient high-resolution follow-up. This combination can build statistics and extract as much information as possible from each cluster. To that end, I present two complementary instruments, the Simons Observatory (SO) Large Aperture Telescope (LAT) and the TolTEC camera on the Large Millimeter Telescope (LMT). Together, these instruments will probe clusters from arcminute to arcsecond scales, unlocking cosmological information about dark matter and dark energy, as well as illuminating astrophysical processes within clusters such as shocks from mergers and feedback mechanisms in the ICM. I present an overview of these instruments and then focus on my contributions. These include metamaterial anti-reflection (AR) coatings fabricated for the refracting optics of the SO LAT and TolTEC, maximum likelihood mapmaking techniques that have been implemented in the TolTEC data reduction pipeline, early images from the TolTEC camera's 2022 commissioning observations, and conclude with forecasts for upcoming cluster observations with the SO LAT and the TolTEC camera. 000012645 540__ $$a© 2024 Joseph Golec 000012645 6531_ $$aGalaxy Clusters 000012645 6531_ $$aMillimeter Wavelengths 000012645 6531_ $$aSunyaev–Zeldovich effect 000012645 690__ $$aPhysical Sciences Division 000012645 691__ $$aPhysics 000012645 7001_ $$1https://orcid.org/0000-0002-4421-0267$$2ORCID$$aGolec, Joseph E.$$uUniversity of Chicago 000012645 72012 $$aJeffrey McMahon 000012645 72014 $$aLuca Grandi 000012645 72014 $$aWayne Hu 000012645 72014 $$aClarence Chang 000012645 8564_ $$yApproval Form$$955420fa4-cad5-4d9e-ab56-d7077d99016c$$s65532$$uhttps://knowledge.uchicago.edu/record/12645/files/Joseph%20Golec%20DAF%20Signed.pdf$$erestricted_admin 000012645 8564_ $$yDissertation$$9561d468a-8c7f-49c9-b11e-8681e3ef92a3$$s42949216$$uhttps://knowledge.uchicago.edu/record/12645/files/Golec_thesis_revised.pdf$$ePublic 000012645 908__ $$aI agree 000012645 909CO $$ooai:uchicago.tind.io:12645$$pDissertations$$pGLOBAL_SET 000012645 983__ $$aDissertation