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

Journal of Cosmology and Astroparticle Physics - Tập 2020 Số 12 - Trang 045-045 - 2020
Steve K. Choi, Matthew Hasselfield, Shuay-Pwu Patty Ho, Brian J. Koopman, Marius Lungu, Maximilian H. Abitbol, Graeme E. Addison, P. A. R. Ade, Simone Aiola, David Alonso, M. Amiri, Stefania Amodeo, Elio Angile, J. E. Austermann, Taylor Baildon, Nicholas Battaglia, James A. Beall, Rachel Bean, Daniel Becker, J. Richard Bond, Sarah Marie Bruno, Erminia Calabrese, Victoria Calafut, L. E. Campusano, Felipe Carrero, Grace E. Chesmore, Hsiao-Mei Cho, Susan E. Clark, Nicholas F. Cothard, Devin Crichton, Kevin T. Crowley, Omar Darwish, Rahul Datta, E. V. Denison, Mark J. Devlin, Cody J. Duell, Shannon M. Duff, Adriaan J. Duivenvoorden, Jo Dunkley, Rolando Dünner, Thomas Essinger-Hileman, Max Fankhanel, Simone Ferraro, Anna E. Fox, Brittany Fuzia, Patricio A. Gallardo, Vera Gluscevic, Joseph E. Golec, Emily Saldanha, Megan Gralla, Yilun Guan, Kirsten Hall, M. Halpern, Dongwon Han, P. Hargrave, Shawn Henderson, Brandon Hensley, J. Colin Hill, G. C. Hilton, Matt Hilton, Adam D. Hincks, Renée Hložek, Johannes Hubmayr, K. M. Huffenberger, John P. Hughes, L. Infante, K. D. Irwin, Rebecca Jackson, Jeff Klein, Kenda Knowles, Arthur Kosowsky, Vincent Lakey, Dale Li, Yaqiong Li, Zack Li, Martine Lokken, S. Loucatos1, Mathew S. Madhavacheril, Felipe Maldonado, Maya Mallaby-Kay, Danica Marsden, L. Maurin2, Jeff McMahon, F. Menanteau, Kavilan Moodley, Timothy D. Morton, Sigurd Næss, Toshiya Namikawa, P. Natoli, Laura Newburgh, J. P. Nibarger, Andrina Nicola, Michael D. Niemack, Michael R. Nolta, John Orlowski-Sherer, Lyman A. Page, Christine G. Pappas, Bruce Partridge, Phumlani Phakathi, Heather Prince, Roberto Puddu, Frank J. Qu, Jesus Rivera, Felipe Rojas, Maria Salatino, Emmanuel Schaan, A. Schillaci, Benjamin L. Schmitt, Neelima Sehgal, Blake D. Sherwin, Carlos Sierra, Jonathan Sievers, Cristobál Sifón, S. P. Sikhosana, Zhilei Xu, David N. Spergel, Suzanne T. Staggs, Jason R. Stevens, Émilie Storer, Dhaneshwar D. Sunder, Eric R. Switzer, B. Thorne, Robert Thornton, Hy Trac, Jesse Treu, C. Tucker, Leila R. Vale, Alexander van Engelen, Jeff Van Lanen, Eve M. Vavagiakis, Kasey Wagoner, Yuhan Wang, Jonathan T. Ward, Edward J. Wollack, Fernando Zago, Ningfeng Zhu
1IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (Bât. 100 et 200, 15 rue Georges Clémenceau 91405 Orsay - France)
2IAS - Institut d'astrophysique spatiale (Bâtiment 121 91405 ORSAY CEDEX - France)

Tóm tắt

We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg2of the 2013–2016 survey, which covers >15000 deg2at 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 byPlanck. 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 χ2of 1.07 (PTE=0.07) withH0=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 =−0.07̂±0.09̂. We directly cross correlate ACT withPlanckand observe generally good agreement but with some discrepancies in TE. All data on which this analysis is based will be publicly released.

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Journal of Cosmology and Astroparticle Physics

Tập 2020 Số 12

045-045

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