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 …

Abstract The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders
about the fundamental theory of nature at play in the extreme gravity regime, where the …

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 angular power spectra and cosmological parameter constraints derived from the
Planck PR4 (NPIPE) maps of the cosmic microwave background. NPIPE, released by the …

Deviations from the blackbody spectral energy distribution of the cosmic microwave
background (CMB) are a precise probe of physical processes active both in the early …

We present the first linear polarization measurements from the 2015 long-duration balloon
flight of Spider, which is an experiment that is designed to map the polarization of the cosmic …

Ultra-light dark matter (ULDM) refers to a class of theories, including ultra-light axions, in
which particles with mass comprise a significant fraction of the dark matter. A galactic scale …

One of the central challenges to establishing the role of mergers in galaxy evolution is the
selection of pure and complete merger samples in observations. In particular, while large …

In the Gaia era it is increasingly apparent that traditional static, parameterized models are
insufficient to describe the mass distribution of our complex, dynamically evolving Milky Way …

Most of the baryons in L* galaxies are unaccounted for and are predicted to lie in hot
gaseous halos (T∼ 10 6.5 K) that may extend beyond R 200. A hot gaseous halo will …