The Atacama Cosmology Telescope: temperature and gravitational lensing power spectrum measurements from three seasons of data

Journal Article · Tue Apr 01 00:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/04/014· OSTI ID:22373665

Das, Sudeep ^[1]; Louis, Thibaut; Calabrese, Erminia; Dunkley, Joanna ^[2]; Nolta, Michael R.; Bond, J Richard; Hajian, Amir; Hincks, Adam D. ^[3]; Addison, Graeme E.; Halpern, Mark ^[4]; Battistelli, Elia S. ^[5]; Crichton, Devin; Gralla, Megan ^[6]; Devlin, Mark J.; Dicker, Simon ^[7]; Dünner, Rolando ^[8]; Fowler, Joseph W. ^[9]; Hasselfield, Matthew; Hlozek, Renée ^[10]; Hilton, Matt ^[11] ; others, and

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1. Argonne National Laboratory, 9700 S. Cass Ave., Lemont, IL 60439 (United States)
2. Sub-department of Astrophysics, University of Oxford, Keble Road, Oxford, OX1 3RH (United Kingdom)
3. Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON, M5S 3H8 Canada (Canada)
4. Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z4 Canada (Canada)
5. Department of Physics, University of Rome ''La Sapienza'', Piazzale Aldo Moro 5, I-00185 Rome (Italy)
6. Dept. of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218-2686 (United States)
7. Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA, 19104 (United States)
8. Departamento de Astronomía y Astrofísica, Facultad de Física, Pontificía Universidad Católica, Casilla 306, Santiago 22 (Chile)
9. NIST Quantum Devices Group, 325 Broadway Mailcode 817.03, Boulder, CO, 80305 (United States)
10. Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 (United States)
11. Centre for Astronomy and Particle Theory, School of Physics and Astronomy, University of Nottingham, NG7 2RD (United Kingdom)

We present the temperature power spectra of the cosmic microwave background (CMB) derived from the three seasons of data from the Atacama Cosmology Telescope (ACT) at 148 GHz and 218 GHz, as well as the cross-frequency spectrum between the two channels. We detect and correct for contamination due to the Galactic cirrus in our equatorial maps. We present the results of a number of tests for possible systematic error and conclude that any effects are not significant compared to the statistical errors we quote. Where they overlap, we cross-correlate the ACT and the South Pole Telescope (SPT) maps and show they are consistent. The measurements of higher-order peaks in the CMB power spectrum provide an additional test of the ΛCDM cosmological model, and help constrain extensions beyond the standard model. The small angular scale power spectrum also provides constraining power on the Sunyaev-Zel'dovich effects and extragalactic foregrounds. We also present a measurement of the CMB gravitational lensing convergence power spectrum at 4.6σ detection significance.

• OSTI ID: 22373665
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 04; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COMPARATIVE EVALUATIONS
CONTAMINATION
CONVERGENCE
COSMOLOGICAL MODELS
COSMOLOGY
DETECTION
GHZ RANGE 100-1000
GRAVITATIONAL LENSES
MAPS
PEAKS
RELICT RADIATION
SPECTRA
STANDARD MODEL
TELESCOPES