THE ATACAMA COSMOLOGY TELESCOPE: COSMOLOGY FROM GALAXY CLUSTERS DETECTED VIA THE SUNYAEV-ZEL'DOVICH EFFECT
Neelima SehgalKavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305-4085, USAHy TracDepartment of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USAViviana AcquavivaDepartment of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USAP. A. R. AdeSchool of Physics and Astronomy, Cardiff University, The Parade, Cardiff, Wales CF24 3AA, UKPaula AguirreDepartamento de Astronomía y Astrofísica, Facultad de Física, Pontificía Universidad Católica de Chile, Casilla 306, Santiago 22, ChileM. AmiriDepartment of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z4, CanadaJohn W. AppelJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAL. Felipe BarrientosDepartamento de Astronomía y Astrofísica, Facultad de Física, Pontificía Universidad Católica de Chile, Casilla 306, Santiago 22, ChileE. S. BattistelliDepartment of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z4, CanadaJ. Richard BondCanadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON M5S 3H8, CanadaBen BrownDepartment of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USAB. BurgerDepartment of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z4, CanadaJay ChervenakCode 553/665, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USASudeep DasBerkeley Center for Cosmological Physics, LBL and Department of Physics, University of California, Berkeley, CA 94720, USAMark J. DevlinDepartment of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USASimon DickerDepartment of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USAW. B. DorieseNIST Quantum Devices Group, 325 Broadway Mailcode 817.03, Boulder, CO 80305, USAJoanna DunkleyDepartment of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USARolando DünnerDepartamento de Astronomía y Astrofísica, Facultad de Física, Pontificía Universidad Católica de Chile, Casilla 306, Santiago 22, ChileThomas Essinger-HilemanJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAR. P. FisherJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAJoseph W. FowlerJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAAmir HajianCanadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON M5S 3H8, CanadaM. HalpernDepartment of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z4, CanadaMatthew HasselfieldDepartment of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z4, CanadaCarlos Hernández-MonteagudoMax Planck Institut für Astrophysik, Postfach 1317, D-85741 Garching bei München, GermanyG. C. HiltonNIST Quantum Devices Group, 325 Broadway Mailcode 817.03, Boulder, CO 80305, USAMatt HiltonAstrophysics and Cosmology Research Unit, School of Mathematical Sciences, University of KwaZulu-Natal, Durban 4041, South AfricaAdam D. HincksJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USARenée HložekDepartment of Astrophysics, Oxford University, Oxford OX1 3RH, UKDavid HoltzJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAK. M. HuffenbergerDepartment of Physics, University of Miami, Coral Gables, FL 33124, USADavid H. HughesInstituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Tonantzintla, Puebla, MexicoJohn P. HughesDepartment of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8019, USAL. InfanteDepartamento de Astronomía y Astrofísica, Facultad de Física, Pontificía Universidad Católica de Chile, Casilla 306, Santiago 22, ChileK. D. IrwinNIST Quantum Devices Group, 325 Broadway Mailcode 817.03, Boulder, CO 80305, USAAndrew JonesJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAJean Baptiste JuinDepartamento de Astronomía y Astrofísica, Facultad de Física, Pontificía Universidad Católica de Chile, Casilla 306, Santiago 22, ChileJeff KleinDepartment of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USAArthur KosowskyDepartment of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USAJudy M. LauDepartment of Physics, Stanford University, Stanford, CA 94305-4085, USAM. LimonColumbia Astrophysics Laboratory, 550 W. 120th St. Mail Code 5247, New York, NY 10027, USAYen‐Ting LinDepartamento de Astronomía y Astrofísica, Facultad de Física, Pontificía Universidad Católica de Chile, Casilla 306, Santiago 22, ChileRobert H. LuptonDepartment of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USATobias A. MarriageDepartment of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USADanica MarsdenDepartment of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USAKrista MartocciJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAP. MauskopfSchool of Physics and Astronomy, Cardiff University, The Parade, Cardiff, Wales CF24 3AA, UKF. MenanteauDepartment of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8019, USAKavilan MoodleyAstrophysics and Cosmology Research Unit, School of Mathematical Sciences, University of KwaZulu-Natal, Durban 4041, South AfricaH. MoseleyCode 553/665, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USACalvin B. NetterfieldDepartment of Physics, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7, CanadaMichael D. NiemackJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAMichael R. NoltaCanadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON M5S 3H8, CanadaLyman A. PageJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USALucas ParkerJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USABruce PartridgeDepartment of Physics and Astronomy, Haverford College, Haverford, PA 19041, USABeth ReidInstitut de Ciencies del Cosmos (ICC), University of Barcelona, Barcelona 08028, SpainBlake D. SherwinJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAJonathan SieversCanadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON M5S 3H8, CanadaDavid N. SpergelDepartment of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USASuzanne T. StaggsJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USADaniel S. SwetzDepartment of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USAEric R. SwitzerJoseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAR. J. ThorntonDepartment of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USAC. TuckerSchool of Physics and Astronomy, Cardiff University, The Parade, Cardiff, Wales CF24 3AA, UKRyan WarneAstrophysics and Cosmology Research Unit, School of Mathematical Sciences, University of KwaZulu-Natal, Durban 4041, South AfricaEdward J. WollackCode 553/665, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USAYue ZhaoCode 553/665, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
2011en
ABI
Annotatsiya
We present constraints on cosmological parameters based on a sample of Sunyaev-Zel'dovich-selected galaxy clusters detected in a millimeter-wave survey by the Atacama Cosmology Telescope. The cluster sample used in this analysis consists of 9 optically-confirmed high-mass clusters comprising the high-significance end of the total cluster sample identified in 455 square degrees of sky surveyed during 2008 at 148 GHz. We focus on the most massive systems to reduce the degeneracy between unknown cluster astrophysics and cosmology derived from SZ surveys. We describe the scaling relation between cluster mass and SZ signal with a 4-parameter fit. Marginalizing over the values of the parameters in this fit with conservative priors gives sigma_8 = 0.851 +/- 0.115 and w = -1.14 +/- 0.35 for a spatially-flat wCDM cosmological model with WMAP 7-year priors on cosmological parameters. This gives a modest improvement in statistical uncertainty over WMAP 7-year constraints alone. Fixing the scaling relation between cluster mass and SZ signal to a fiducial relation obtained from numerical simulations and calibrated by X-ray observations, we find sigma_8 = 0.821 +/- 0.044 and w = -1.05 +/- 0.20. These results are consistent with constraints from WMAP 7 plus baryon acoustic oscillations plus type Ia supernoava which give sigma_8 = 0.802 +/- 0.038 and w = -0.98 +/- 0.053. A stacking analysis of the clusters in this sample compared to clusters simulated assuming the fiducial model also shows good agreement. These results suggest that, given the sample of clusters used here, both the astrophysics of massive clusters and the cosmological parameters derived from them are broadly consistent with current models.
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