The Atacama Cosmology Telescope: DR4 maps and cosmological parameters
The Atacama Cosmology Telescope: DR4 maps and cosmological parameters
Dec 30, 2020·,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Simone Aiola
Erminia Calabrese
Loı̈c 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
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
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
and
. The maps cover more than
, the deepest
with noise levels below
. We use the power spectrum derived from almost
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,
. By combining ACT data with large-scale information from WMAP we measure
, at
confidence, in excellent agreement with the independently-measured Planck satellite estimate (from ACT alone we find
). The
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
; the number of relativistic species, the primordial Helium fraction, and the running of the spectral index are consistent with
predictions to within
. 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.
Type
Publication
Journal of Cosmology and Astroparticle Physics, Issue 12, article id. 047