The Λ CDM model provides a good fit to most astronomical observations but harbors large
areas of phenomenology and ignorance. With the improvements in the precision and …

We review the current status of Early Dark Energy (EDE) models proposed to resolve the
“Hubble tension”, the discrepancy between “direct” measurements of the current expansion …

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 …

We report observations from the Hubble Space Telescope (HST) of Cepheid variables in the
host galaxies of 42 Type Ia supernovae (SNe Ia) used to calibrate the Hubble constant (H 0) …

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 …

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 …

The simplest ΛCDM model provides a good fit to a large span of cosmological data but
harbors large areas of phenomenology and ignorance. With the improvement of the number …

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 …

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 …

Since the expansion of the universe was first established by Edwin Hubble and Georges
Lemaître about a century ago, the Hubble constant H_0 H 0 which measures its rate has …