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The Atacama Cosmology Telescope: two-season ACTPol spectra and parameters

Louis, Thibaut, Grace, Emily, Hasselfield, Matthew, Lungu, Marius, Maurin, Loïc, Addison, Graeme E., Ade, Peter A. R. ORCID:, Aiola, Simone, Allison, Rupert, Amiri, Mandana, Angile, Elio, Battaglia, Nicholas, Beall, James A., de Bernardis, Francesco, Bond, J. Richard, Britton, Joe, Calabrese, Erminia ORCID:, Cho, Hsiao-mei, Choi, Steve K., Coughlin, Kevin, Crichton, Devin, Crowley, Kevin, Datta, Rahul, Devlin, Mark J., Dicker, Simon R., Dunkley, Joanna, Dünner, Rolando, Ferraro, Simone, Fox, Anna E., Gallardo, Patricio, Gralla, Megan, Halpern, Mark, Henderson, Shawn, Hill, J. Colin, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Ho, S.P. Patty, Huang, Zhiqi, Hubmayr, Johannes, Huffenberger, Kevin M., Hughes, John P., Infante, Leopoldo, Irwin, Kent, Kasanda, Simon Muya, Klein, Jeff, Koopman, Brian, Kosowsky, Arthur, Li, Dale, Madhavacheril, Mathew, Marriage, Tobias A., McMahon, Jeff, Menanteau, Felipe, Moodley, Kavilan, Munson, Charles, Naess, Sigurd, Nati, Federico, Newburgh, Laura, Nibarger, John, Niemack, Michael D., Nolta, Michael R., Nuñez, Carolina, Page, Lyman A., Pappas, Christine, Partridge, Bruce, Rojas, Felipe, Schaan, Emmanuel, Schmitt, Benjamin L., Sehgal, Neelima, Sherwin, Blake D., Sievers, Jon, Simon, Sara, Spergel, David N., Staggs, Suzanne T., Switzer, Eric R., Thornton, Robert, Trac, Hy, Treu, Jesse, Tucker, Carole ORCID:, Engelen, Alexander Van, Ward, Jonathan T. and Wollack, Edward J. 2017. The Atacama Cosmology Telescope: two-season ACTPol spectra and parameters. Journal of Cosmology and Astroparticle Physics 2017 (06) , 031. 10.1088/1475-7516/2017/06/031

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We present the temperature and polarization angular power spectra measured by the Atacama Cosmology Telescope Polarimeter (ACTPol). We analyze night-time data collected during 2013{14 using two detector arrays at 149 GHz, from 548 deg2 of sky on the celestial equator. We use these spectra, and the spectra measured with the MBAC camera on ACT from 2008{10, in combination with Planck and WMAP data to estimate cosmological parameters from the temperature, polarization, and temperature-polarization cross-correlations. We �nd the new ACTPol data to be consistent with the �CDM model. The ACTPol temperature-polarization cross-spectrum now provides stronger constraints on multiple parameters than the ACTPol temperature spectrum, including the baryon density, the acoustic peak angular scale, and the derived Hubble constant. The new ACTPol data provide information on damping tail parameters. The joint uncertainty on the number of neutrino species and the primordial helium fraction is reduced by 20% when adding ACTPol to Planck temperature data alone.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Uncontrolled Keywords: CMBR experiments, CMBR polarisation, cosmological parameters from CMBR
Publisher: IOP Publishing
ISSN: 1475-7516
Date of First Compliant Deposit: 26 June 2017
Date of Acceptance: 28 May 2017
Last Modified: 15 Nov 2023 10:58

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