Dark Energy & Cosmological Tensions
DESI baryon acoustic oscillations and evolving dark energy hints, the Hubble tension, S8 and the status of Lambda-CDM.
Most influential
- Planck 2013 results. XVI. Cosmological parameters
We present the first results based on Planck measurements of the CMB temperature and lensing-potential power spectra. The Planck spectra at high multipoles are extremely well described by the standard spatially-flat six-parameter LCDM cosmology. In this model Planck data determine the cosmological parameters to high precision. We find a low value of the Hubb…
Article6,888 citationsarXiv:1303.5076doi:10.1051/0004-6361/201321591 - The Banana Bridge - The Unitary Kinematic Solution to the Hubble Tension and the 1.618 x 137 Master Law
We present HST photometry of a selected sample of 50 long-period, low-extinction Milky Way Cepheids measured on the same WFC3 F555W, F814W, and F160W-band photometric system as extragalactic Cepheids in SN Ia hosts. These bright Cepheids were observed with the WFC3 spatial scanning mode in the optical and near-infrared to mitigate saturation and reduce pixel…
Article510 citationsarXiv:1804.10655doi:10.5281/zenodo.19098596 - The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample
We present optical light curves, redshifts, and classifications for 365 spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1) Medium Deep Survey. We detail improvements to the PS1 SN photometry, astrometry and calibration that reduce the systematic uncertainties in the PS1 SN Ia distances. We combine the subset of 279 PS…
Article2,710 citationsarXiv:1710.00845doi:10.3847/1538-4357/aab9bb - In the realm of the Hubble tension—a review of solutions *
The $Λ$CDM model provides a good fit to a large span of cosmological data but harbors areas of phenomenology. With the improvement of the number and the accuracy of observations, discrepancies among key cosmological parameters of the model have emerged. The most statistically significant tension is the $4-6σ$ disagreement between predictions of the Hubble co…
Article2,077 citationsarXiv:2103.01183doi:10.1088/1361-6382/ac086d - A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT *
We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to reduce the uncertainty in the local value of the Hubble constant (H_0) from 3.3% to 2.4%. Improvements come from new, near-infrared observations of Cepheid variables in 11 new hosts of recent SNe~Ia, more than doubling the sample of SNe~Ia having a Cepheid-calibrated distance for a …
Article2,249 citationsarXiv:1604.01424doi:10.3847/0004-637x/826/1/56 - The Pantheon+ Analysis: Cosmological Constraints
Abstract We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves of 1550 distinct Type Ia supernovae (SNe Ia) ranging in redshift from z = 0.001 to 2.26. This work features an increased sample size from the addition of multiple cross-calibrated photometric systems of SNe covering an increased redshift span, and impr…
Abstract excerpt by Dillon Brout et al., CC-BY, https://doi.org/10.3847/1538-4357/ac8e04; truncated.
Article1,368 citationsdoi:10.3847/1538-4357/ac8e04 - Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory
We present the cosmological implications from final measurements of clustering using galaxies, quasars, and Ly$α$ forests from the completed Sloan Digital Sky Survey (SDSS) lineage of experiments in large-scale structure. These experiments, composed of data from SDSS, SDSS-II, BOSS, and eBOSS, offer independent measurements of baryon acoustic oscillation (BA…
Article1,351 citationsarXiv:2007.08991doi:10.1103/physrevd.103.083533 - Tensions between the early and late Universe
The standard cosmological model successfully describes many observations from widely different epochs of the Universe, from primordial nucleosynthesis to the accelerating expansion of the present day. However, as the basic cosmological parameters of the model are being determined with increasing and unprecedented precision, it is not guaranteed that the same…
Article1,380 citationsarXiv:1907.10625doi:10.1038/s41550-019-0902-0 - H0LiCOW – XIII. A 2.4 per cent measurement of H0 from lensed quasars: 5.3σ tension between early- and late-Universe probes
We present a measurement of the Hubble constant ($H_{0}$) and other cosmological parameters from a joint analysis of six gravitationally lensed quasars with measured time delays. All lenses except the first are analyzed blindly with respect to the cosmological parameters. In a flat $Λ$CDM cosmology, we find $H_{0} = 73.3_{-1.8}^{+1.7}$, a 2.4% precision meas…
Article1,178 citationsarXiv:1907.04869doi:10.1093/mnras/stz3094 - Early Dark Energy Can Resolve The Hubble Tension
Early dark energy (EDE) that behaves like a cosmological constant at early times (redshifts $z\gtrsim3000$) and then dilutes away like radiation or faster at later times can solve the Hubble tension. In these models, the sound horizon at decoupling is reduced resulting in a larger value of the Hubble parameter $H_0$ inferred from the cosmic microwave backgro…
Article1,014 citationsarXiv:1811.04083doi:10.1103/physrevlett.122.221301 - Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with ΛCDM
We present an expanded sample of 75 Milky Way Cepheids with Hubble Space Telescope (HST) photometry and Gaia EDR3 parallaxes which we use to recalibrate the extragalactic distance ladder and refine the determination of the Hubble constant. All HST observations were obtained with the same instrument (WFC3) and filters (F555W, F814W, F160W) used for imaging of…
Article815 citationsarXiv:2012.08534doi:10.3847/2041-8213/abdbaf - The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch*
We present a new and independent determination of the local value of the Hubble constant based on a calibration of the Tip of the Red Giant Branch (TRGB) applied to Type Ia supernovae (SNeIa). We find a value of Ho = 69.8 +/- 0.8 (+/-1.1\% stat) +/- 1.7 (+/-2.4\% sys) km/sec/Mpc. The TRGB method is both precise and accurate, and is parallel to, but independe…
Article843 citationsarXiv:1907.05922doi:10.3847/1538-4357/ab2f73 - DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
We present baryon acoustic oscillation (BAO) measurements from more than 14 million galaxies and quasars drawn from the Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2), based on three years of operation. For cosmology inference, these galaxy measurements are combined with DESI Lyman-$α$ forest BAO results presented in a companion paper. The …
Article617 citationsarXiv:2503.14738doi:10.1103/tr6y-kpc6 - Measurements of the Hubble Constant: Tensions in Perspective*
Measurement of the distances to nearby galaxies have improved rapidly in recent decades. The ever-present challenge is to reduce systematic effects, especially as greater distances are probed, and the uncertainties become larger. In this paper, we combine several recent calibrations of the Tip of the Red Giant Branch (TRGB) method. These calibrations are int…
Article576 citationsarXiv:2106.15656doi:10.3847/1538-4357/ac0e95 - DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
We present cosmological results from the measurement of baryon acoustic oscillations (BAO) in galaxy, quasar and Lyman-$α$ forest tracers from the first year of observations from the Dark Energy Spectroscopic Instrument (DESI), to be released in the DESI Data Release 1. DESI BAO provide robust measurements of the transverse comoving distance and Hubble rate,…
Article1,155 citationsarXiv:2404.03002doi:10.1088/1475-7516/2025/02/021
Newest work
- The Korean Space Telescope (KST): A Dedicated Space Observatory for the Dark UniversePreprintarXiv:2610.39094
- Cosmic birefringence tomography with radio galaxies I: Testing birefringence solutions to the CMB-BAO tensionPreprintarXiv:2610.39449
- Cosmological constraints on extra radiation and early dark energy with lepton asymmetry and varying quark massesPreprintarXiv:2610.39579
- Theoretical Consistency and Observational Constraints on Entropic CosmologyPreprintarXiv:2610.40205doi:10.1016/j.physletb.2026.141085
- Cosmological tests of chameleon dark energy with dark sector couplingPreprintarXiv:2610.40347
- UNIONS: Red and blue alignments of DESI DR1 galaxiesPreprintarXiv:2610.40411
- Machine Learning Based Classification of Type 1 Active Galactic NucleiPreprintarXiv:2610.38280
- Testing Extended Exponential Infrared Teleparallel Gravity with CMB, DESI, and PantheonPlusPreprintarXiv:2610.38684
- Probing the local primordial non-Gaussianity with clustering of FRB dispersion measure and galaxiesPreprintarXiv:2610.38735
- Relativistic N-body simulations with mass-varying neutrinosPreprintarXiv:2610.36752