Abstract The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good
description of a wide range of astrophysical and cosmological data. However, there are a …

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 …

We present a sample-variance-limited measurement of the temperature power spectrum
(TT) of the cosmic microwave background using observations of a∼ 1500 deg 2 field made …

Tidal disruption events (TDEs) are bursts of electromagnetic energy that are released when
supermassive black holes at the centres of galaxies violently disrupt a star that passes too …

Measurements of the Hubble constant and, more generally, measurements of the expansion
rate and distances over the interval 0< z< 1 appear to be inconsistent with the predictions of …

CMB-S4 Science Case, Reference Design, and Project Plan Page 1 CMB-S4 Science Case,
Reference Design, and Project Plan CMB-S4 Collaboration July 9, 2019 arxiv:1907.04473v1 …

We search for evidence of parity-violating physics in the Planck 2018 polarization data and
report on a new measurement of the cosmic birefringence angle β. The previous …

We study the distortions of equilibrium spectra of relic neutrinos due to the interactions with
electrons, positrons, and neutrinos in the early Universe. We solve the integro-differential …

Abstract Recent Baryon Acoustic Oscillation (BAO) measurements released by DESI, when
combined with Cosmic Microwave Background (CMB) data from Planck and two different …

I review and discuss the possible implications for inflation resulting from considering new
physics in light of the Hubble tension. My study is motivated by a simple argument that the …