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arxiv 1301.1037 v2 pith:G4JT23VD submitted 2013-01-06 astro-ph.CO

The Atacama Cosmology Telescope: Temperature and Gravitational Lensing Power Spectrum Measurements from Three Seasons of Data

Sudeep Das , Thibaut Louis , Michael R. Nolta , Graeme E. Addison , Elia S. Battistelli , J Richard Bond , Erminia Calabrese , Devin Crichton Mark J. Devlin
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Simon Dicker Joanna Dunkley Rolando D\"unner Joseph W. Fowler Megan Gralla Amir Hajian Mark Halpern Matthew Hasselfield Matt Hilton Adam D. Hincks Ren\'ee Hlozek Kevin M. Huffenberger John P. Hughes Kent D. Irwin Arthur Kosowsky Robert H. Lupton Tobias A. Marriage Danica Marsden Felipe Menanteau Kavilan Moodley Michael D. Niemack Lyman A. Page Bruce Partridge Erik D. Reese Benjamin L. Schmitt Neelima Sehgal Blake D. Sherwin Jonathan L. Sievers David N. Spergel Suzanne T. Staggs Daniel S. Swetz Eric R. Switzer Robert Thornton Hy Trac Ed Wollack
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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 Lambda CDM 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 4.6-sigma detection significance.

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Cited by 5 Pith papers

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    astro-ph.CO 2026-05 unverdicted novelty 6.0

    21cmEMUv3 emulates the cylindrical 21cm power spectrum via score-based diffusion and six other 21cmFAST observables via LSTM networks at sub-percent accuracy, then uses the emulator to infer a lower limit on soft-band...

  2. CMB Lensing Reconstruction Using Two Years of Temperature Data from the SPT-3G Summer Survey

    astro-ph.CO 2026-07 conditional novelty 5.0

    First CMB lensing reconstruction from two years of SPT-3G Summer temperature data yields A_comb = 1.015 ± 0.053 over 50 < L < 2000, consistent with Planck 2018 ΛCDM.

  3. Planck 2018 results. VI. Cosmological parameters

    astro-ph.CO 2018-07 accept novelty 5.0

    Final Planck CMB data confirms the flat 6-parameter ΛCDM model with Ω_c h² = 0.120 ± 0.001, Ω_b h² = 0.0224 ± 0.0001, n_s = 0.965 ± 0.004, τ = 0.054 ± 0.007, H_0 = 67.4 ± 0.5 km/s/Mpc, and no strong evidence for extensions.

  4. Constraints on Cosmic Strings from the Curl-Mode CMB Lensing Power Spectrum measured by ACT DR6

    astro-ph.CO 2026-06 unverdicted novelty 4.0

    ACT DR6 curl lensing yields 2σ bounds Gμ P^{-1} ≤ 3.5×10^{-5} (small-P) and Gμ ≤ 5.0×10^{-5} (P=1), tightened further with Planck 2013 data.

  5. Planck 2018 results. X. Constraints on inflation

    astro-ph.CO 2018-07 accept novelty 4.0

    Updated Planck CMB measurements give ns = 0.9649 ± 0.0042, r < 0.056, confirm flatness at 0.4 percent, and show no evidence for scale-dependent features or non-slow-roll dynamics in the inflaton potential.