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The Atacama Cosmology Telescope: A measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz

Choi, Steve K., Hasselfield, Matthew, Shuay-Pwu, Patty Ho, Koopman, Brian, Lungu, Marius, Arbitol, Maximmilian H., Addison, Graeme E., Ade, Peter A. R. ORCID:, Aiola, Simone, Alonso, David, Amiri, Mandana, Amodeo, Stefania, Angile, Elio, Austerman, Jason E., Baildon, Taylor, Battaglia, Nick, Beall, James A, Bean, Rachel, Becker, Daniel T., Bond, J. Richard, Bruno, Sarah Marie, Calabrese, Erminia ORCID:, Calafut, Victoria, Campusano, Luis E., Carrero, Felipe, Chesmore, Grace E., Cho, Hsiao-Mei, Clark, Susan E., Cotard, Nicholas F., Crichton, Devin, Crowley, Kevin T., Darwish, Omar, Datta, Rahul, Denison, Edward V., Devlin, Mark J., Duell, Cody J., Duff, Shannon M., Duivenvoorden, Adriaan J., Dunkley, Jo, Dunner, Rolando, Essinger-Hileman, Thomas, Fankhanel, Max, Ferraro, Simone, Fox, Anna E., Fuzia, Brittany, Gallardo, Patricio, Gluscevic, Vera, Golec, Joseph E., Grace, Emily, Gralla, Megan, Guan, Yilun, Hall, Kirsten, Halpern, Mark, Han, Dongwon, Hargrave, Peter, Henderson, Shawn, Brandon, Hensley, Hill, J. Colin, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renee, Hubmayr, Johannes, Huffenberger, Kevin M., Hughes, Jonh P., Infante, Leopoldo, Irwin, Kent, Jackson, Rebecca, Klein, Jeff, Knowles, Kenda, Kosowsky, Arthur, Lakey, Vincent, Li, Dale, Li, Yaqiong, Li, Zack, Lokken, Martine, Louis, Thibaut, Macinnis, Amanda, Madhavacheril, Mathew, Maldonado, Felipe, Mallaby-Kay, Maya, Marsden, Danica, Maurin, Loic, McMahon, Jeff, Menanteau, Felipe, Moodley, Kavilan, Morton, Tim, Naess, Sigurd, Namikawa, Toshiya, Nati, Federico, Newburgh, Laura, Nibarga, John P., Nicola, Andrina, Niemack, Michael D., Nolta, Michael R., Orlowski-Sherer, John, Page, Lyman A., Pappas, Christine G., Partridge, Bruce, Phakathi, Phumlani, Prince, Heather, Puddu, Roberto, Qu, Frank J, Rivera, Jesus, Robertson, Naomi, Rojas, Felipe, Salatino, Maria, Schaan, Emmanuel, Schillaci, Alessandro, Schmitt, Benjamin L., Sehgal, Neelima, Sherwin, Blake D., Sierra, Carlos, Sievers, Jon, Sifon, Cristobal, Sikhosana, Precious, Simon, Sara, Spergel, David N., Staggs, Suzanne T., Stevens, Jason, Storer, Emilie, Sunder, Dhaneshwar D, Switzer, Eric R., Thorne, Ben, Thornton, Robert, Trac, Hy, Treu, Jesse, Tucker, Carole ORCID:, Vale, Leila R., Van Engelen, Alexander, Van Lanen, Jeff, Vavagiakis, Eve K., Wagoner, Kasey, Wang, Yuhan, Ward, Jonathan T., Wollack, Edward J., Xu, Zheilei, Zago, Fernando and Zhu, Ningfeng 2020. The Atacama Cosmology Telescope: A measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz. Journal of Cosmology and Astroparticle Physics 12 (2020) , 045. 10.1088/1475-7516/2020/12/045

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We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg2 of the 2013–2016 survey, which covers >15000 deg2 at 98 and 150 GHz. For this analysis we adopt a blinding strategy to help avoid confirmation bias and, related to this, show numerous checks for systematic error done before unblinding. Using the likelihood for the cosmological analysis we constrain secondary sources of anisotropy and foreground emission, and derive a 'CMB-only' spectrum that extends to ℓ=4000. At large angular scales, foreground emission at 150 GHz is ~1% of TT and EE within our selected regions and consistent with that found by Planck. Using the same likelihood, we obtain the cosmological parameters for ΛCDM for the ACT data alone with a prior on the optical depth of τ=0.065±0.015. ΛCDM is a good fit. The best-fit model has a reduced χ2 of 1.07 (PTE=0.07) with H0=67.9±1.5 km/s/Mpc. We show that the lensing BB signal is consistent with ΛCDM and limit the celestial EB polarization angle to ψP =−0.07o±0.09o. We directly cross correlate ACT with Planck and observe generally good agreement but with some discrepancies in TE. All data on which this analysis is based will be publicly released.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Physics and Astronomy
Publisher: IOP Publishing
ISSN: 1475-7516
Date of First Compliant Deposit: 2 December 2020
Date of Acceptance: 19 November 2020
Last Modified: 18 Jun 2024 18:29

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