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28 March 2024
 
  » arxiv » 2007.7288

 Article overview


The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters
Simone Aiola ; Erminia Calabrese ; Loïc 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 Dünner ; 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 ; Kirsten Hall ; 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 ; Renée Hložek ; 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 ; 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 ;
Date 14 Jul 2020
AbstractWe 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 $10$ $mu$K-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, $H_0$. By combining ACT data with large-scale information from WMAP we measure $H_0=67.6pm 1.1$ km/s/Mpc, at 68% confidence, in excellent agreement with the independently-measured Planck satellite estimate (from ACT alone we find $H_0=67.9pm 1.5$ km/s/Mpc). The $Lambda$CDM 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 1$sigma$; the number of relativistic species, the primordial Helium fraction, and the running of the spectral index are consistent with $Lambda$CDM predictions to within 1.5-2$sigma$. 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.
Source arXiv, 2007.7288
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