Challenges for ΛCDM: An update

L Perivolaropoulos, F Skara - New Astronomy Reviews, 2022 - Elsevier
A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

The H0 Olympics: A fair ranking of proposed models

N Schöneberg, GF Abellán, AP Sánchez, SJ Witte… - Physics Reports, 2022 - Elsevier
Despite the remarkable success of the Λ Cold Dark Matter (Λ CDM) cosmological model, a
growing discrepancy has emerged (currently measured at the level of∼ 4− 6 σ) between the …

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point …

S Alam, M Aubert, S Avila, C Balland, JE Bautista… - Physical Review D, 2021 - APS
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) …

Planck 2018 results-VI. Cosmological parameters

N Aghanim, Y Akrami, M Ashdown, J Aumont… - Astronomy & …, 2020 - aanda.org
We present cosmological parameter results from the final full-mission Planck measurements
of the cosmic microwave background (CMB) anisotropies, combining information from the …

Large Magellanic Cloud Cepheid standards provide a 1% foundation for the determination of the Hubble constant and stronger evidence for physics beyond ΛCDM

AG Riess, S Casertano, W Yuan… - The Astrophysical …, 2019 - iopscience.iop.org
We present an improved determination of the Hubble constant from Hubble Space
Telescope (HST) observations of 70 long-period Cepheids in the Large Magellanic Cloud …

Planck 2018 results-X. Constraints on inflation

Y Akrami, F Arroja, M Ashdown, J Aumont… - Astronomy & …, 2020 - aanda.org
We report on the implications for cosmic inflation of the 2018 release of the Planck cosmic
microwave background (CMB) anisotropy measurements. The results are fully consistent …

The Atacama Cosmology Telescope: DR4 maps and cosmological parameters

S Aiola, E Calabrese, L Maurin, S Naess… - … of Cosmology and …, 2020 - iopscience.iop.org
We present new arcminute-resolution maps of the Cosmic Microwave Background
temperature and polarization anisotropy from the Atacama Cosmology Telescope, using …

Tensions between the early and late Universe

L Verde, T Treu, AG Riess - Nature Astronomy, 2019 - nature.com
A Kavli Institute for Theoretical Physics workshop in July 2019 directed attention to the
Hubble constant discrepancy. New results showed that it does not appear to depend on the …

H0LiCOW – XIII. A 2.4 per cent measurement of H0 from lensed quasars: 5.3σ tension between early- and late-Universe probes

KC Wong, SH Suyu, GCF Chen… - Monthly Notices of …, 2020 - academic.oup.com
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 …

Early dark energy can resolve the Hubble tension

V Poulin, TL Smith, T Karwal, M Kamionkowski - Physical review letters, 2019 - APS
Early dark energy (EDE) that behaves like a cosmological constant at early times (redshifts
z≳ 3000) and then dilutes away like radiation or faster at later times can solve the Hubble …