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  • The Atacama Cosmology Telescope: High-resolution component-separated maps across one-third of the sky
    Coulton, William R; Duivenvoorden, Adriaan J; Hill, J Colin; Abril-Cabezas, Irene; Ade, Peter A R; Aiola, Simone; Amodeo, Stefania; An, Rui; Atkins, Zachary; Austermann, Jason E; Battaglia, Nicholas; Battistelli, Elia Stefano; Beringue, Benjamin; Biermann, Emily; Bolliet, Boris; Cai, Hongbo; Calafut, Victoria; Capalbo, Valentina; Carrero, Felipe; Hsiao-mei, Cho; Rodrigo Córdova Rosado; Coughlin, Kevin; Crowley, Kevin T; Devlin, Mark J; Doze, Peter; Duff, Shannon M; Dunkley, Jo; Dünner, Rolando; Fanfani, Valentina; Fankhanel, Max; Freundt, Rodrigo; Fuzia, Brittany; Gallardo, Patricio A; Garrido, Xavier; Gluscevic, Vera; Han, Dongwon; Healy, Erin; Henderson, Shawn; Hilton, Gene C; Hincks, Adam D; Shuay-Pwu Patty Ho; Hubmayr, Johannes; Huffenberger, Kevin M; Isopi, Giovanni; Keller, Ben; Kim, Joshua; Knowles, Kenda; Koopman, Brian J; Kosowsky, Arthur; Kramer, Darby; Kusiak, Aleksandra; Lakey, Victoria; Lee, Eunseong; Li, Zack; Li, Yaqiong; Limon, Michele; Lungu, Marius; MacCrann, Niall; MacInnis, Amanda; Maldonado, Diego; Maldonado, Felipe; Marques, Gabriela A; Joshiwa van Marrewijk; McCarthy, Fiona; Menanteau, Felipe; Moodley, Kavilan; Naess, Sigurd; Namikawa, Toshiya; Nati, Federico; Newburgh, Laura; Nolta, Michael R; Page, Lyman A; Partridge, Bruce; Puddu, Roberto; Radiconi, Federico; Robertson, Naomi; Rojas, Felipe; Sakuma, Tai; Salatino, Maria; Schmitt, Benjamin L; Sherwin, Blake D; Sierra, Carlos; Sievers, Jon; Sifón, Cristóbal; Sonka, Rita; Staggs, Suzanne T; Storer, Emilie; Switzer, Eric R; Tampier, Niklas; Thornton, Robert; Ullom, Joel; Vale, Leila R; Vargas, Cristian; Wagoner, Kasey; Wang, Yuhan; Wenzl, Lukas; Wollack, Edward J; Xu, Zhilei; Zago, Fernando; Zheng, Kaiwen

    arXiv (Cornell University), 07/2023
    Paper, Journal Article

    Observations of the millimeter sky contain valuable information on a number of signals, including the blackbody cosmic microwave background (CMB), Galactic emissions, and the Compton-\(y\) distortion due to the thermal Sunyaev-Zel'dovich (tSZ) effect. Extracting new insight into cosmological and astrophysical questions often requires combining multi-wavelength observations to spectrally isolate one component. In this work, we present a new arcminute-resolution Compton-\(y\) map, which traces out the line-of-sight-integrated electron pressure, as well as maps of the CMB in intensity and E-mode polarization, across a third of the sky (around 13,000 sq.~deg.). We produce these through a joint analysis of data from the Atacama Cosmology Telescope (ACT) Data Release 4 and 6 at frequencies of roughly 93, 148, and 225 GHz, together with data from the \textit{Planck} satellite at frequencies between 30 GHz and 545 GHz. We present detailed verification of an internal linear combination pipeline implemented in a needlet frame that allows us to efficiently suppress Galactic contamination and account for spatial variations in the ACT instrument noise. These maps provide a significant advance, in noise levels and resolution, over the existing \textit{Planck} component-separated maps and will enable a host of science goals including studies of cluster and galaxy astrophysics, inferences of the cosmic velocity field, primordial non-Gaussianity searches, and gravitational lensing reconstruction of the CMB.

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