학술논문
The Atacama Cosmology Telescope: DR4 maps and cosmological parameters
Document Type
Report
Author
Simone Aiola; Erminia Calabrese; Loic Maurin; Sigurd Naess; Benjamin L. Schmitt; Maximilian H. Abitbol; Graeme E. Addison; Peter A. R. Ade; David Alonso; Mandana Amiri; Stefania Amodeo; Elio Angile; Jason E. Austermann; Taylor Baildon; Nick Battaglia; James A. Beall; Rachel Bean; Daniel T. Becker; J Richard Bond; Sarah Marie Bruno; Victoria Calafut; Luis E. Campusano; Felipe Carrero; Grace E. Chesmore; Hsiao-mei Cho; Steve K. Choi; Susan E. Clark; Nicholas F. Cothard; Devin Crichton; Kevin T. Crowley; Omar Darwish; Rahul Datta; Edward V. Denison; Mark J. Devlin; Cody J. Duell; Shannon M. Duff; Adriaan J. Duivenvoorden; Jo Dunkley; Rolando Dunner; Thomas Essinger-Hileman; Max Fankhanel; Simone Ferraro; Anna E. Fox; Brittany Fuzia; Patricio A. Gallardo; Vera Gluscevic; Joseph E. Golec; Emily Grace; Megan Gralla; Yilun Guan; 8 Mark Halpern; Dongwon Han; Peter Hargrave; Matthew Hasselfield; Jakob M. Helton; Shawn Henderson; Brandon Hensley; J. Colin Hill; Gene C. Hilton; Matt Hilton; Adam D. Hincks; Renee Hlozek; Shuay-Pwu Patty Ho; Johannes Hubmayr; Kevin M. Huffenberger; John P. Hughes; Leopoldo Infante; Kent Irwin; Rebecca Jackson; Jeff Klein; Kenda Knowles; Brian Koopman; Arthur Kosowsky; Vincent Lakey; Dale Li; Yaqiong Li; Zack Li; Martine Lokken; Thibaut Louis; Marius Lungu; Amanda MacInnis; Mathew Madhavacheril; Felipe Maldonado; Maya Mallaby-Kay; Danica Marsden; Jeff McMahon; Felipe Menanteau; Kavilan Moodley; Tim Morton; Toshiya Namikawa; Federico Nati; Laura Newburgh; John P. Nibarger; Andrina Nicola; Michael D. Niemack; Michael R. Nolta; John Orlowski-Sherer; Lyman A. Page; Christine G. Pappas; Bruce Partridge; Phumlani Phakathi; Giampaolo Pisano; Heather Prince; Roberto Puddu; Frank J. Qu; Jesus Rivera; Naomi Robertson; Felipe Rojas; Maria Salatino; Emmanuel Schaan; Alessandro Schillaci; Neelima Sehgal; Blake D. Sherwin; Carlos Sierra; Jon Sievers; Cristobal Sifon; Precious Sikhosana; Sara Simon; David N. Spergel; Suzanne T. Staggs; Jason Stevens; Emilie Storer; Dhaneshwar D. Sunder; Eric R. Switzer; Ben Thorne; Robert Thornton; Hy Trac; Jesse Treu; Carole Tucker; Leila R. Vale; Alexander Van Engelen; Jeff Van Lanen; Eve M. Vavagiakis; Kasey Wagoner; Yuhan Wang; Jonathan T. Ward; Edward J Wollack; Zhilei Xu; Fernando Zago; Ningfeng Zhu
Source
Journal of Cosmology and Astroparticle Physics. 2020(12)
Subject
Language
English
ISSN
1475-7516
Abstract
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 deg(^2), the deepest 600 deg(^2) with noise levels below 10µK-arcmin. We use the power spectrum derived from almost 6,000 deg(^2) 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.