• DOI:10.1088/1475-7516/2020/12/047
• Corpus ID: 220525781

The Atacama Cosmology Telescope: DR4 maps and cosmological parameters

@article{Aiola2020TheAC,
  title={The Atacama Cosmology Telescope: DR4 maps and cosmological parameters},
  author={Simone Aiola and Erminia Calabrese and Lo{\"i}c Maurin and Sigurd Naess and Benjamin L. Schmitt and Maximilian Abitbol and Graeme E. Addison and Peter A. R. Ade and David Alonso and Mandana Amiri and Stefania Amodeo and Elio Angile and J. E. Austermann and Taylor Baildon and Nicholas Battaglia and J. A. Beall and Rachel Bean and Daniel T. Becker and J. Richard Bond and Sarah Marie M. Bruno and Victoria Calafut and Luis E. Campusano and Felipe Carrero and Grace E. Chesmore and Hsiao-mei Cho. and Steve K. Choi and Susan E. Clark and Nicholas F. Cothard and Devin Crichton and Kevin T. Crowley and Omar Darwish and Rahul Datta and Ed V. Denison and Mark J. Devlin and Cody J. Duell and Shannon M. Duff and Adriaan J. Duivenvoorden and Jo Dunkley and Rolando Dunner and Thomas Essinger-Hileman and M. O. Fankhanel and Simone Ferraro and Anna E. Fox and Brittany Fuzia and Patricio A. Gallardo and Vera Gluscevic and Joseph E. Golec and Emily Grace and Megan B. Gralla and Yilun Guan and Kirsten R. Hall and Mark Halpern and Dongwon Han and P. Hargrave and Matthew Hasselfield and Jakob M. Helton and Shawn Wesley Henderson and Brandon S. Hensley and J. Colin Hill and G. C. Hilton and Matt Hilton and Adam D. Hincks and Ren'ee A. Hlovzek and S. P. Ho and Johannes Hubmayr and Kevin M. Huffenberger and John P. Hughes and Leopoldo Infante and Kent D. Irwin and Rebecca Jackson and Jeffrey Klein and Kenda Knowles and Brian J. Koopman and Arthur B. Kosowsky and Vincent Lakey and Dale Li and Yaqiong Li and Zack Li and Martine Lokken and Thibaut Louis and Marius Lungu and Amanda Macinnis and Mathew S. Madhavacheril and Felipe Maldonado and Maya Mallaby-Kay and Danica W Marsden and Jeff J. McMahon and Felipe Menanteau and Kavilan Moodley and Tim Morton and Toshiya Namikawa and Federico Nati and Laura Newburgh and John P. Nibarger and A. Nicola and Michael D. Niemack and Michael R. Nolta and John Orlowski-Sherer and Lyman A. Page and Christine G. Pappas and Bruce Partridge and Phumlani Phakathi and Heather Prince and Roberto Puddu and Frank J. Qu and Jesus Rivera and Naomi Robertson and Felipe Rojas and Maria Salatino and Emmanuel Schaan and Alessandro Schillaci and Neelima Sehgal and Blake D. Sherwin and Carlos E. Sierra and Jonathan L. Sievers and Crist{\'o}bal Sif{\'o}n and Precious Sikhosana and Sara M. Simon and David N. Spergel and Suzanne Staggs and Jason R. Stevens and Emilie R. Storer and Dhaneshwar D. Sunder and E. R. Switzer and Ben Thorne and Robert J. Thornton and Hy Trac and Jesse I. Treu and C E Tucker and L. R. Vale and Alexander van Engelen and Jeff van Lanen and Eve M. Vavagiakis and Kasey Wagoner and Yuhan Wang and J. T. Ward and Edward J. Wollack and Zhilei Xu and Fernando Zago and Ningfeng Zhu},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2020},
  volume={2020},
  pages={047 - 047}
}

• S. Aiola, E. Calabrese, +137 authors N. Zhu
• Published 14 July 2020
• Physics
• Journal of Cosmology and Astroparticle Physics

We present new arcminute-resolution maps of the Cosmic Microwave Background temperature and polarization anisotropy from the Atacama Cosmology Telescope, using data taken from 2013–2016 at 98 and 150 GHz. The maps cover more than 17,000 deg2, the deepest 600 deg2 with noise levels below 10μK-arcmin. We use the power spectrum derived from almost 6,000 deg2 of these maps to constrain cosmology. The ACT data enable a measurement of the angular scale of features in both the divergence-like polarization and the temperature anisotropy, tracing both the velocity and density at last-scattering. From these one can derive the distance to the last-scattering surface and thus infer the local expansion rate, H0. By combining ACT data with large-scale information from WMAP we measure H0=67.6± 1.1 km/s/Mpc, at 68% confidence, in excellent agreement with the independently-measured Planck satellite estimate (from ACT alone we find H0=67.9± 1.5 km/s/Mpc). The ΛCDM model provides a good fit to the ACT data, and we find no evidence for deviations: both the spatial curvature, and the departure from the standard lensing signal in the spectrum, are zero to within 1σ; the number of relativistic species, the primordial Helium fraction, and the running of the spectral index are consistent with ΛCDM predictions to within 1.5–2.2σ. We compare ACT, WMAP, and Planck at the parameter level and find good consistency; we investigate how the constraints on the correlated spectral index and baryon density parameters readjust when adding CMB large-scale information that ACT does not measure. The DR4 products presented here will be publicly released on the NASA Legacy Archive for Microwave Background Data Analysis.