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

Abstract

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 deg{sup 2} 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 find the new ACTPol data to be consistent with the ΛCDM 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.

Authors:
 [1]; ; ;  [2];  [3]; ;  [4];  [5];  [6];  [7]; ;  [8];  [9];  [10]; ; ;  [11];  [12];  [13];
  1. UPMC Univ Paris 06, UMR7095, Institut d'Astrophysique de Paris, F-75014, Paris (France)
  2. Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544 (United States)
  3. Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States)
  4. Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States)
  5. Instituto de Astrofísica and Centro de Astro-Ingeniería, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago (Chile)
  6. Department of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218-2686 (United States)
  7. School of Physics and Astronomy, Cardiff University, The Parade, Cardiff, Wales, CF24 3AA (United Kingdom)
  8. Sub-Department of Astrophysics, University of Oxford, Keble Road, Oxford, OX1 3RH (United Kingdom)
  9. Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z4 (Canada)
  10. Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 (United States)
  11. NIST Quantum Devices Group, 325 Broadway Mailcode 817.03, Boulder, CO 80305 (United States)
  12. Department of Physics, Cornell University, Ithaca, NY 14853 (United States)
  13. Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON, M5S 3H8 (Canada)
Publication Date:
OSTI Identifier:
22676155
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 06; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BARYONS; CORRELATIONS; COSMOLOGY; DENSITY; EQUATOR; GHZ RANGE; HELIUM; NEUTRINOS; POLARIMETERS; POLARIZATION; SPECTRA; TELESCOPES

Citation Formats

Louis, Thibaut, Grace, Emily, Aiola, Simone, Choi, Steve K., Hasselfield, Matthew, Lungu, Marius, Angile, Elio, Maurin, Loïc, Addison, Graeme E., Ade, Peter A. R., Allison, Rupert, Calabrese, Erminia, Amiri, Mandana, Battaglia, Nicholas, Beall, James A., Britton, Joe, Cho, Hsiao-mei, De Bernardis, Francesco, Bond, J Richard, E-mail: louis@iap.fr, and and others. The Atacama Cosmology Telescope: two-season ACTPol spectra and parameters. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/06/031.
Louis, Thibaut, Grace, Emily, Aiola, Simone, Choi, Steve K., Hasselfield, Matthew, Lungu, Marius, Angile, Elio, Maurin, Loïc, Addison, Graeme E., Ade, Peter A. R., Allison, Rupert, Calabrese, Erminia, Amiri, Mandana, Battaglia, Nicholas, Beall, James A., Britton, Joe, Cho, Hsiao-mei, De Bernardis, Francesco, Bond, J Richard, E-mail: louis@iap.fr, & and others. The Atacama Cosmology Telescope: two-season ACTPol spectra and parameters. United States. doi:10.1088/1475-7516/2017/06/031.
Louis, Thibaut, Grace, Emily, Aiola, Simone, Choi, Steve K., Hasselfield, Matthew, Lungu, Marius, Angile, Elio, Maurin, Loïc, Addison, Graeme E., Ade, Peter A. R., Allison, Rupert, Calabrese, Erminia, Amiri, Mandana, Battaglia, Nicholas, Beall, James A., Britton, Joe, Cho, Hsiao-mei, De Bernardis, Francesco, Bond, J Richard, E-mail: louis@iap.fr, and and others. Thu . "The Atacama Cosmology Telescope: two-season ACTPol spectra and parameters". United States. doi:10.1088/1475-7516/2017/06/031.
@article{osti_22676155,
title = {The Atacama Cosmology Telescope: two-season ACTPol spectra and parameters},
author = {Louis, Thibaut and Grace, Emily and Aiola, Simone and Choi, Steve K. and Hasselfield, Matthew and Lungu, Marius and Angile, Elio and Maurin, Loïc and Addison, Graeme E. and Ade, Peter A. R. and Allison, Rupert and Calabrese, Erminia and Amiri, Mandana and Battaglia, Nicholas and Beall, James A. and Britton, Joe and Cho, Hsiao-mei and De Bernardis, Francesco and Bond, J Richard, E-mail: louis@iap.fr and and others},
abstractNote = {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 deg{sup 2} 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 find the new ACTPol data to be consistent with the ΛCDM 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.},
doi = {10.1088/1475-7516/2017/06/031},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 06,
volume = 2017,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}