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Title: The Simons Observatory: science goals and forecasts

Journal Article · · Journal of Cosmology and Astroparticle Physics
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The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and forecast its performance. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands centered at: 27, 39, 93, 145, 225 and 280 GHz. The initial configuration of SO will have three small-aperture 0.5-m telescopes and one large-aperture 6-m telescope, with a total of 60,000 cryogenic bolometers. Our key science goals are to characterize the primordial perturbations, measure the number of relativistic species and the mass of neutrinos, test for deviations from a cosmological constant, improve our understanding of galaxy evolution, and constrain the duration of reionization. The small aperture telescopes will target the largest angular scales observable from Chile, mapping ≈ 10% of the sky to a white noise level of 2 μK-arcmin in combined 93 and 145 GHz bands, to measure the primordial tensor-to-scalar ratio, r, at a target level of σ(r)=0.003. The large aperture telescope will map ≈ 40% of the sky at arcminute angular resolution to an expected white noise level of 6 μK-arcmin in combined 93 and 145 GHz bands, overlapping with the majority of the Large Synoptic Survey Telescope sky region and partially with the Dark Energy Spectroscopic Instrument. With up to an order of magnitude lower polarization noise than maps from the Planck satellite, the high-resolution sky maps will constrain cosmological parameters derived from the damping tail, gravitational lensing of the microwave background, the primordial bispectrum, and the thermal and kinematic Sunyaev-Zel'dovich effects, and will aid in delensing the large-angle polarization signal to measure the tensor-to-scalar ratio. In conclusion, the survey will also provide a legacy catalog of 16,000 galaxy clusters and more than 20,000 extragalactic sources.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
The Simons Observatory collaboration
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515; SC0007859
OSTI ID:
1504488
Journal Information:
Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 02 Vol. 2019; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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Templates for the Sunyaev-Zel'dovich Angular Power Spectrum text January 2018
Designs for a large-aperture telescope to map the CMB 10× faster journal January 2016
Internal delensing of Planck CMB temperature and polarization text January 2017
Two-season Atacama Cosmology Telescope polarimeter lensing power spectrum text January 2017
Demonstration of Cosmic Microwave Background Delensing Using the Cosmic Infrared Background text January 2016
Calculation of the axion mass based on high-temperature lattice quantum chromodynamics text January 2016
Axion Cosmology text January 2018
Can CMB Surveys Help the AGN Community? journal August 2017
CONTRASTING GALAXY FORMATION FROM QUANTUM WAVE DARK MATTER, ψ DM, WITH ΛCDM, USING PLANCK AND HUBBLE DATA journal February 2016
QUANTIFYING DISCORDANCE IN THE 2015 PLANCK CMB SPECTRUM journal February 2016
Detection of Lensing Substructure Using alma Observations of the Dusty Galaxy Sdp.81 journal May 2016
The Kinetic Sunyaev–Zel’Dovich Effect from Reionization: Simulated Full-Sky maps at Arcminute Resolution journal June 2016
Detection of the Splashback Radius and halo Assembly bias of Massive Galaxy Clusters journal June 2016
MILLIMETER TRANSIENT POINT SOURCES IN THE SPTpol 100 SQUARE DEGREE SURVEY journal October 2016
Cosmological Constraints from Galaxy Clusters in the 2500 Square-Degree Spt-Sz Survey journal November 2016
The Halo Boundary of Galaxy Clusters in the SDSS journal May 2017
Practical Weak-lensing Shear Measurement with Metacalibration journal May 2017
CMB Polarization B -mode Delensing with SPTpol and Herschel journal August 2017
Results from EDGES High-band. I. Constraints on Phenomenological Models for the Global 21 cm Signal journal September 2017
A Measurement of the Cosmic Microwave Background B -mode Polarization Power Spectrum at Subdegree Scales from Two Years of polarbear Data journal October 2017
Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data journal January 2018
The Impact of Baryonic Physics on the Kinetic Sunyaev–Zel’dovich Effect journal January 2018
Elucidating ΛCDM: Impact of Baryon Acoustic Oscillation Measurements on the Hubble Constant Discrepancy journal January 2018
One Percent Determination of the Primordial Deuterium Abundance journal March 2018
The Effects of Bandpass Variations on Foreground Removal Forecasts for Future CMB Experiments journal July 2018
Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant journal July 2018
A Projected Estimate of the Reionization Optical Depth Using the CLASS Experiment’s Sample Variance Limited E-mode Measurement journal August 2018
The Atacama Cosmology Telescope: The Two-season ACTPol Sunyaev–Zel’dovich Effect Selected Cluster Catalog journal March 2018
CMB Cluster Lensing: Cosmography with the Longest Lever Arm text January 2007
The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects text January 2007
Parametrized Post-Friedmann Signatures of Acceleration in the CMB text January 2008
Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints text January 2008
The Australia Telescope 20 GHz Survey: The Source Catalogue text January 2009
The Atacama Cosmology Telescope: a measurement of the primordial power spectrum text January 2011
The Atacama Cosmology Telescope: ACT-CL J0102-4915 "El Gordo," a Massive Merging Cluster at Redshift 0.87 text January 2011
A measurement of secondary cosmic microwave background anisotropies with two years of South Pole Telescope observations text January 2011
Bias-Hardened CMB Lensing text January 2012
The synergy between the Dark Energy Survey and the South Pole Telescope text January 2013
Inflationary Freedom and Cosmological Neutrino Constraints text January 2014
Weighing the Giants IV: Cosmology and Neutrino Mass text January 2014
Planck intermediate results. XXX. The angular power spectrum of polarized dust emission at intermediate and high Galactic latitudes text January 2014
A search for ultra-light axions using precision cosmological data text January 2014
A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope text January 2014
New Bounds for Axions and Axion-Like Particles with keV-GeV Masses text January 2015
A Joint Analysis of BICEP2/Keck Array and Planck Data text January 2015
Planck 2015 results. XXII. A map of the thermal Sunyaev-Zeldovich effect text January 2015
Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters text January 2015
Scale-dependent gravitational waves from a rolling axion text January 2015
Eliminating the optical depth nuisance from the CMB with 21 cm cosmology text January 2015
Advanced ACTPol Cryogenic Detector Arrays and Readout text January 2015
The Kinetic Sunyaev-Zel'dovich Effect from Reionization: Simulated Full Sky Maps at Arcminute Resolution text January 2015
Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope text January 2016
Cosmological constraints from thermal Sunyaev Zeldovich power spectrum revisited text January 2016
Calibrating Cluster Number Counts with CMB lensing text January 2016
Ultralight scalars as cosmological dark matter text January 2016
Reconstructing CMB fluctuations and the mean reionization optical depth text January 2017
Large Tensor Non-Gaussianity from Axion-Gauge Fields Dynamics text January 2017
Parameter constraints from cross-correlation of CMB lensing with galaxy clustering text January 2017
Dark Energy Survey Year 1 Results: A Precise H0 Measurement from DES Y1, BAO, and D/H Data text January 2017
Galaxy growth in a massive halo in the first billion years of cosmic history text January 2017
Constraints on scattering of keV--TeV dark matter with protons in the early Universe text January 2017
First Cosmological Constraint on the Effective Theory of Dark Matter-Proton Interactions text January 2018
Foreground Biases on Primordial Non-Gaussianity Measurements from the CMB Temperature Bispectrum: Implications for Planck and Beyond text January 2018
Designs for next generation CMB survey strategies from Chile text January 2018
How to measure CMB polarization power spectra without losing information text January 2000
Gravitational lensing as a contaminant of the gravity wave signal in CMB text January 2003
Detecting Dark Matter Annihilation with CMB Polarization : Signatures and Experimental Prospects text January 2005
Extracting primordial non-gaussianity without cosmic variance text January 2009

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Searching for extremal spots in Planck lensing maps journal March 2021
CMB polarization analysis on circular scans journal August 2021
CMB-HD: An Ultra-Deep, High-Resolution Millimeter-Wave Survey Over Half the Sky text January 2019
CMB-HD: Astro2020 RFI Response preprint January 2020
Assembly and Integration Process of the High-Density Detector Array Readout Modules for the Simons Observatory journal March 2020
Measurement of the splashback feature around SZ-selected Galaxy clusters with DES, SPT, and ACT journal May 2019
Fractional polarization of extragalactic sources in the 500 deg2 SPTpol survey journal October 2019
The quenching and morphological evolution of central galaxies is facilitated by the feedback-driven expulsion of circumgalactic gas journal November 2019
Exact joint likelihood of pseudo-Cℓ estimates from correlated Gaussian cosmological fields journal November 2019
Tomographic measurement of the intergalactic gas pressure through galaxy–tSZ cross-correlations journal December 2019
Developing a unified pipeline for large-scale structure data analysis with angular power spectra – II. A case study for magnification bias and radio continuum surveys journal December 2019
Information theoretic bounds on cosmic string detection in CMB maps with noise journal December 2019
Early Dark Energy can Resolve the Hubble Tension journal June 2019
Axion dark matter detection with CMB polarization journal July 2019
Future CMB constraints on cosmic birefringence and implications for fundamental physics journal July 2019
Improving constraints on fundamental physics parameters with the clustering of Sunyaev-Zeldovich selected galaxy clusters journal September 2019
CMB-S4 forecast on the primordial non-Gaussianity parameter of feature models journal September 2019
Standard model Higgs field and hidden sector cosmology journal October 2019
Probing correlated compensated isocurvature perturbations using scale-dependent galaxy bias journal November 2019
T E correlation coefficient of P l a n c k legacy data journal November 2019
Bias to CMB lensing from lensed foregrounds journal December 2019
Scale-independent R 2 inflation journal December 2019
Dirac neutrino mass generation from a Majorana messenger journal February 2020
Constraining the properties of gaseous halos via cross-correlations of upcoming galaxy surveys and thermal Sunyaev-Zel’dovich maps journal February 2020
Trans-Planckian censorship, inflation, and dark matter journal March 2020
Foreground-Immune Cosmic Microwave Background Lensing with Shear-Only Reconstruction journal May 2019
Transverse Velocities with the Moving Lens Effect journal August 2019
Primordial features from linear to nonlinear scales journal December 2019
CMB-S4 forecast on the primordial non-Gaussianity parameter of feature models text January 2019
Primordial features from linear to nonlinear scales text January 2020
Several Problems in Particle Physics and Cosmology Solved in One SMASH text January 2019
Constraints on the redshift evolution of astrophysical feedback with Sunyaev-Zeldovich effect cross-correlations text January 2019
Revisiting a negative cosmological constant from low-redshift data text January 2019
The quenching and morphological evolution of central galaxies is facilitated by the feedback-driven expulsion of circumgalactic gas text January 2019
CMB targets after the latest Planck data release text January 2019

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