# Dark Energy & Cosmological Tensions Domain: Astrophysics & Cosmology · 246 papers indexed · newest 2026-10-29 DESI baryon acoustic oscillations and evolving dark energy hints, the Hubble tension, S8 and the status of Lambda-CDM. Key concepts: dark energy, Hubble tension, DESI, baryon acoustic oscillations, S8 tension, Hubble constant ## Most influential - **[Planck 2013 results. XVI. Cosmological parameters](https://space-kitty.com/papers/arxiv:1303.5076)**. Peter A. R. Ade, N. Aghanim, Charmaine Armitage-Caplan et al. · 2014 · Astronomy and Astrophysics (arXiv:1303.5076 · doi:10.1051/0004-6361/201321591 · 6,888 citations). Source: > 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 Hubble constant, H0=67.3+/-1.2 km/s/Mpc and a high value of the matter density parameter, Omega\_m=0.315+/-0.017 (+/-1 sigma errors) in excellent agreement with constraints from baryon acoustic oscillation (BAO) surveys. Including curvature, we … - **[The Banana Bridge - The Unitary Kinematic Solution to the Hubble Tension and the 1.618 x 137 Master Law](https://space-kitty.com/papers/arxiv:1804.10655)**. Epperson, Arya · 2026 · Zenodo (CERN European Organization for Nuclear Research) (arXiv:1804.10655 · doi:10.5281/zenodo.19098596 · 510 citations). Source: > 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-to-pixel calibration errors to reach a mean photometric error of 5 millimags per observation. We use the new Gaia DR2 parallaxes and HST photometry to simultaneously constrain the cosmic distance scale and to measure the DR2 parallax zerop… - **[The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample](https://space-kitty.com/papers/arxiv:1710.00845)**. Daniel M. Scolnic, D. O. Jones, A. Rest et al. · 2018 · The Astrophysical Journal (arXiv:1710.00845 · doi:10.3847/1538-4357/aab9bb · 2,710 citations). Source: > 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 PS1 SN Ia ($0.03 \< z \< 0.68$) with useful distance estimates of SN Ia from SDSS, SNLS, various low-z and HST samples to form the largest combined sample of SN Ia consisting of a total of 1048 SN Ia ranging from $0.01 \< z \< 2.3$, which we call… - **[In the realm of the Hubble tension—a review of solutions \*](https://space-kitty.com/papers/arxiv:2103.01183)**. Eleonora Di Valentino, Olga Mena, Supriya Pan et al. · 2021 · Classical and Quantum Gravity (arXiv:2103.01183 · doi:10.1088/1361-6382/ac086d · 2,077 citations). Source: > 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 constant $H\_0$ by early time probes with $Λ$CDM model, and a number of late time, model-independent determinations of $H\_0$ from local measurements of distances and redshifts. The high precision and consistency of the data at both ends presen… - **[A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT \*](https://space-kitty.com/papers/arxiv:1604.01424)**. Adam G. Riess, Lucas M. Macri, Samantha L. Hoffmann et al. · 2016 · The Astrophysical Journal (arXiv:1604.01424 · doi:10.3847/0004-637x/826/1/56 · 2,249 citations). Source: > 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 total of 19; these leverage the magnitude-z relation based on 300 SNe~Ia at z\<0.15. All 19 hosts and the megamaser system NGC4258 were observed with WFC3, thus nullifying cross-instrument zeropoint errors. Other improvements include a 33% r… - **[The Pantheon+ Analysis: Cosmological Constraints](https://space-kitty.com/papers/doi:10.3847/1538-4357/ac8e04)**. Dillon Brout, Daniel M. Scolnic, B Popovic et al. · 2022 · The Astrophysical Journal (doi:10.3847/1538-4357/ac8e04 · 1,368 citations). Source: > 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 improved treatments of systematic uncertainties in comparison to the original Pantheon analysis, which together result in a factor of 2 improvement in cosmological constraining power. For a flat ΛCDM model, we find Ω M = 0.334 ± 0.018 from SNe … > _Abstract excerpt by Dillon Brout et al., CC-BY, https://doi.org/10.3847/1538-4357/ac8e04; truncated._ - **[Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory](https://space-kitty.com/papers/arxiv:2007.08991)**. Shadab Alam, M Aubert, Santiago Avila et al. · 2021 · Physical review. D/Physical review. D. (arXiv:2007.08991 · doi:10.1103/physrevd.103.083533 · 1,351 citations). Source: > 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 (BAO) measurements of angular-diameter distances and Hubble distances relative to the sound horizon, $r\_d$, from eight different samples and six measurements of the growth rate parameter, $fσ\_8$, from redshift-space distortions (RSD). This com… - **[Tensions between the early and late Universe](https://space-kitty.com/papers/arxiv:1907.10625)**. Licia Verde, Tommaso Treu, Adam G. Riess · 2019 · Nature Astronomy (arXiv:1907.10625 · doi:10.1038/s41550-019-0902-0 · 1,380 citations). Source: > 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 model will fit more precise observations from widely different cosmic epochs. Discrepancies developing between observations at early and late cosmological time may require an expansion of the standard model, and may lead to the discovery o… - **[H0LiCOW – XIII. A 2.4 per cent measurement of H0 from lensed quasars: 5.3σ tension between early- and late-Universe probes](https://space-kitty.com/papers/arxiv:1907.04869)**. Kenneth C. Wong, Sherry H. Suyu, Geoff C.-F. Chen et al. · 2019 · Monthly Notices of the Royal Astronomical Society (arXiv:1907.04869 · doi:10.1093/mnras/stz3094 · 1,178 citations). Source: > 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 measurement, in agreement with local measurements of $H\_{0}$ from type Ia supernovae calibrated by the distance ladder, but in $3.1σ$ tension with $Planck$ observations of the cosmic microwave background (CMB). This method is completely indepen… - **[Early Dark Energy Can Resolve The Hubble Tension](https://space-kitty.com/papers/arxiv:1811.04083)**. Vivian Poulin, Tristan L. Smith, Tanvi Karwal et al. · 2018 · Phys. Rev. Lett. 122, 221301 (2019) (arXiv:1811.04083 · doi:10.1103/physrevlett.122.221301 · 1,014 citations). Source: > 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 background (CMB). We consider two physical models for this EDE, one involving an oscillating scalar field and another a slowly-rolling field. We perform a detailed calculation of the evolution of perturbations in these models. A Markov Chain Monte… - **[Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with ΛCDM](https://space-kitty.com/papers/arxiv:2012.08534)**. Adam G. Riess, Stefano Casertano, Wenlong Yuan et al. · 2021 · The Astrophysical Journal Letters (arXiv:2012.08534 · doi:10.3847/2041-8213/abdbaf · 815 citations). Source: > 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 extragalactic Cepheids in Type Ia supernova (SN Ia) hosts. The HST observations used the WFC3 spatial scanning mode to mitigate saturation and reduce pixel-to-pixel calibration errors, reaching a mean photometric error of 5 millimags per o… - **[The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch\*](https://space-kitty.com/papers/arxiv:1907.05922)**. Wendy L. Freedman, Barry F. Madore, Dylan Hatt et al. · 2019 · The Astrophysical Journal (arXiv:1907.05922 · doi:10.3847/1538-4357/ab2f73 · 843 citations). Source: > 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 independent of the Cepheid distance scale. Our value sits midway in the range defined by the current Hubble tension. It agrees at the 1.2-sigma level with that of the Planck 2018 estimate, and at the 1.7-sigma level with the SHoES measurement of Ho … - **[DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints](https://space-kitty.com/papers/arxiv:2503.14738)**. DESI Collaboration, M. Abdul-Karim, J. Aguilar et al. · 2025 · Phys. Rev. D 112, 083515, 2025 (arXiv:2503.14738 · doi:10.1103/tr6y-kpc6 · 617 citations). Source: > 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 DR2 BAO results are consistent with DESI DR1 and SDSS, and their distance-redshift relationship matches those from recent compilations of supernovae (SNe) over the same redshift range. The results are well described by a flat $Λ$CDM model, … - **[Measurements of the Hubble Constant: Tensions in Perspective\*](https://space-kitty.com/papers/arxiv:2106.15656)**. Wendy L. Freedman · 2021 · The Astrophysical Journal (arXiv:2106.15656 · doi:10.3847/1538-4357/ac0e95 · 576 citations). Source: > 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 internally self-consistent at the 1% level. New Gaia Early Data Release 3 (EDR3) data provide an additional consistency check, at a (lower) 5% level of accuracy, a result of the well-documented Gaia angular covariance bias. The updated TRGB ca… - **[DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations](https://space-kitty.com/papers/arxiv:2404.03002)**. DESI Collaboration, A. G. Adame, J. Aguilar et al. · 2024 · JCAP 02 (2025) 021 (arXiv:2404.03002 · doi:10.1088/1475-7516/2025/02/021 · 1,155 citations). Source: > 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, or their combination, relative to the sound horizon, in seven redshift bins from over 6 million extragalactic objects in the redshift range $0.1\ - **[Cosmic birefringence tomography with radio galaxies I: Testing birefringence solutions to the CMB-BAO tension](https://space-kitty.com/papers/arxiv:2610.39449)**. Toshiya Namikawa, Fumihiro Naokawa, Richard Battye et al. · 2026 (arXiv:2610.39449). Source: - **[Cosmological constraints on extra radiation and early dark energy with lepton asymmetry and varying quark masses](https://space-kitty.com/papers/arxiv:2610.39579)**. Yo Toda · 2026 (arXiv:2610.39579). Source: - **[Theoretical Consistency and Observational Constraints on Entropic Cosmology](https://space-kitty.com/papers/arxiv:2610.40205)**. Yunliang Ren, Xiaofeng Yang, Xuwei Zhang et al. · 2026 · Phys. Lett. B 883 (2026) 141085 (arXiv:2610.40205 · doi:10.1016/j.physletb.2026.141085). Source: - **[Cosmological tests of chameleon dark energy with dark sector coupling](https://space-kitty.com/papers/arxiv:2610.40347)**. Jia-Qi Wang, Zong-Kuan Guo, Shao-Jiang Wang · 2026 (arXiv:2610.40347). Source: - **[UNIONS: Red and blue alignments of DESI DR1 galaxies](https://space-kitty.com/papers/arxiv:2610.40411)**. R. Paviot, C. Murray, M. Kilbinger et al. · 2026 (arXiv:2610.40411). Source: - **[Machine Learning Based Classification of Type 1 Active Galactic Nuclei](https://space-kitty.com/papers/arxiv:2610.38280)**. Jie Li, Xu-Liang Fan · 2026 (arXiv:2610.38280). Source: - **[Testing Extended Exponential Infrared Teleparallel Gravity with CMB, DESI, and PantheonPlus](https://space-kitty.com/papers/arxiv:2610.38684)**. Mahmoud Hashim, Jackson Levi Said, Waleed El Hanafy et al. · 2026 (arXiv:2610.38684). Source: - **[Probing the local primordial non-Gaussianity with clustering of FRB dispersion measure and galaxies](https://space-kitty.com/papers/arxiv:2610.38735)**. Indranil Das, Gilbert Holder · 2026 (arXiv:2610.38735). Source: - **[Relativistic N-body simulations with mass-varying neutrinos](https://space-kitty.com/papers/arxiv:2610.36752)**. Øyvind Christiansen, Julian Adamek, Mainak Baidya et al. · 2026 (arXiv:2610.36752). Source: --- Space Kitty Archive · https://space-kitty.com · API: https://space-kitty.com/api/v1 · MCP: https://space-kitty.com/mcp · Premium: $0.20/request via x402 (Base Sepolia (testnet)). Metadata: arXiv (CC0), OpenAlex (CC0), Europe PMC (CC BY/CC0 works), ClinicalTrials.gov.