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  1. Atacama Cosmology Telescope: A measurement of galaxy cluster temperatures through relativistic corrections to the thermal Sunyaev-Zeldovich effect

    Publication
    The high electron temperature in galaxy clusters (\(>1\,\)keV or \(>10^7\,\)K) leads to corrections at the level of a few percent in their thermal Sunyaev-Zeldovich …

  2. Unified and Consistent Structure Growth Measurements from Joint ACT, SPT, and Planck CMB Lensing

    Publication
    We present the tightest cosmic microwave background (CMB) lensing constraints to date on the growth of structure by combining CMB lensing measurements from the Atacama Cosmology Telescope (ACT …

  3. Robust CMB B-mode analysis with Needlet-ILC and simulation-based inference

    Publication
    We explore a novel analysis framework for parameter inference with large-scale CMB polarization data. Our method uses simulation-based inference combined with the needlet internal linear combination …

  4. A new constraint on the \(y\)-distortion with FIRAS: implications for feedback models in galaxy formation and cosmic shear measurements

    Publication
    The \(y\)-type distortion of the blackbody spectrum of the cosmic microwave background radiation probes the pressure of the gas trapped in galaxy groups and clusters. We reanalyze …

  5. Backlighting extended gas halos around luminous red galaxies: Kinematic Sunyaev-Zel'dovich effect from DESI Y1 and ACT data

    Publication
    The gas density profile around galaxies, shaped by feedback and affecting the galaxy lensing signal, is imprinted on the cosmic microwave background (CMB) by the kinematic Sunyaev-Zel …

  6. The Atacama Cosmology Telescope: DR6 constraints on extended cosmological models

    Publication
    We use new cosmic microwave background (CMB) primary temperature and polarization anisotropy measurements from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) to test foundational assumptions of …

  7. The Atacama Cosmology Telescope: DR6 power spectra, likelihoods and \(\Lambda\)CDM parameters

    Publication
    We present power spectra of the cosmic microwave background (CMB) anisotropy in temperature and polarization, measured from the Data Release 6 maps made from Atacama Cosmology Telescope (ACT …

  8. The Atacama Cosmology Telescope: DR6 maps

    Publication
    We present Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) maps of the Cosmic Microwave Background temperature and polarization anisotropy at arcminute resolution over three frequency bands centered …

  9. Signal-preserving CMB component separation with machine learning

    Publication
    Analysis of microwave sky signals, such as the cosmic microwave background, often requires component separation using multifrequency methods, whereby different signals are isolated according to their different frequency …

  10. The Atacama Cosmology Telescope: Semi-Analytic Covariance Matrices for the DR6 CMB Power Spectra

    Publication
    The Atacama Cosmology Telescope Data Release 6 (ACT DR6) power spectrum is expected to provide state-of-the-art cosmological constraints, with an associated need for precise error …

  11. Atacama Cosmology Telescope: High-resolution component-separated maps across one third of the sky

    Publication
    Observations of the millimeter sky contain valuable information on a number of signals, including the blackbody cosmic microwave background (CMB), Galactic emissions, and the Compton-\(y\) distortion due …

  12. Augmenting astrophysical scaling relations with machine learning: application to reducing the Sunyaev-Zeldovich flux-mass scatter

    Publication
    Complex astrophysical systems often exhibit low-scatter relations between observable properties (e.g., luminosity, velocity dispersion, oscillation period). These scaling relations illuminate the underlying physics, and can provide …

  13. The Atacama Cosmology Telescope: Constraints on Pre-Recombination Early Dark Energy

    Publication
    The early dark energy (EDE) scenario aims to increase the value of the Hubble constant (H0) inferred from cosmic microwave background (CMB) data over that found in ΛCDM …

  14. CMB-S4: Forecasting Constraints on Primordial Gravitational Waves

    Publication
    CMB-S4---the next-generation ground-based cosmic microwave background (CMB) experiment---is set to significantly advance the sensitivity of CMB measurements and enhance our understanding of the …

  15. Baryonic feedback biases on fundamental physics from lensed CMB power spectra

    Publication
    Upcoming measurements of the small-scale primary cosmic microwave background (CMB) temperature and polarization power spectra (TT/TE/EE) are anticipated to yield transformative constraints on new physics …

  16. BISOU: a balloon project to measure the CMB spectral distortions

    Publication
    The BISOU (Balloon Interferometer for Spectral Observations of the Universe) project aims to study the viability and prospects of a balloon-borne spectrometer, pathfinder of a future space …

  17. Can small-scale baryon inhomogeneities resolve the Hubble tension? An investigation with ACT DR4

    Publication
    Small-scale inhomogeneities in the baryon density around recombination have been proposed as a solution to the tension between local and global determinations of the Hubble constant. These …

  18. A Space Mission to Map the Entire Observable Universe using the CMB as a Backlight

    Publication
    This Science White Paper, prepared in response to the ESA Voyage 2050 call for long-term mission planning, aims to describe the various science possibilities that can be …

  19. The Atacama Cosmology Telescope: Combined kinematic and thermal Sunyaev-Zel'dovich measurements from BOSS CMASS and LOWZ halos

    Publication
    The scattering of cosmic microwave background (CMB) photons off the free-electron gas in galaxies and clusters leaves detectable imprints on high resolution CMB maps: the thermal and …

  20. The Atacama Cosmology Telescope: Modeling the Gas Thermodynamics in BOSS CMASS galaxies from Kinematic and Thermal Sunyaev-Zel'dovich Measurements

    Publication
    The thermal and kinematic Sunyaev-Zel'dovich effects (tSZ, kSZ) probe the thermodynamic properties of the circumgalactic and intracluster medium (CGM and ICM) of galaxies, groups, and clusters …

  21. Accurate analytic model for the weak lensing convergence one-point probability distribution function and its autocovariance

    Publication
    The one-point probability distribution function (PDF) is a powerful summary statistic for non-Gaussian cosmological fields, such as the weak lensing (WL) convergence reconstructed from galaxy shapes …

  22. CMB-S4 Decadal Survey APC White Paper

    Publication
    We provide an overview of the science case, instrument configuration and project plan for the next-generation ground-based cosmic microwave background experiment CMB-S4, for consideration by …

  23. CMB Spectral Distortions: Status and Prospects

    Publication
    Departures of the energy spectrum of the cosmic microwave background (CMB) from a perfect blackbody probe a fundamental property of the universe -- its thermal history. Current upper limits …

  24. The Simons Observatory: Astro2020 Decadal Project Whitepaper

    Publication
    The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that promises to provide breakthrough …

  25. CMB-S4 Science Case, Reference Design, and Project Plan

    Publication
    We present the science case, reference design, and project plan for the Stage-4 ground-based cosmic microwave background experiment CMB-S4.

  26. Can Early Dark Energy Explain EDGES?

    Publication
    The Experiment to Detect the Global Epoch of Reionization Signature (EDGES) collaboration has reported the detection of an absorption feature in the sky-averaged spectrum at ≈78 MHz …

  27. Foreground Biases on Primordial Non-Gaussianity Measurements from the CMB Temperature Bispectrum: Implications for Planck and Beyond

    Publication
    The cosmic microwave background (CMB) temperature bispectrum is currently the most precise tool for constraining primordial non-Gaussianity (NG). The Planck temperature data tightly constrain the amplitude of …