Axions comprise a broad class of particles that can play a major role in explaining the
unknown aspects of cosmology. They are also well-motivated within high energy physics …

A stochastic background of gravitational waves could be created by the superposition of a
large number of independent sources. The physical processes occurring at the earliest …

We summarize the history, concept, scientific program, and technical performance of the
James Webb Space Telescope (JWST, Webb; Gardner et al. 2006). This paper points to and …

A bstract In recent years, several pulsar timing array collaborations have reported first hints
for a stochastic gravitational wave background at nano-Hertz frequencies. Here we …

Fast radio bursts (FRBs) are flashes of unknown physical origin. The majority of FRBs have
been seen only once, although some are known to generate multiple flashes,. Many models …

The detection of gravitational waves from mergers of tens of Solar mass black hole binaries
has led to a surge in interest in primordial black holes (PBHs) as a dark matter candidate …

We derive analytic bounds on the shape of the primordial power spectrum in the context of
single-field inflation. In particular, the steepest possible growth has a spectral index of ns …

We perform a Bayesian search in the latest Pulsar Timing Array (PTA) datasets for a
stochastic gravitational wave (GW) background sourced by curvature perturbations at scales …

We present the final nine-year maps and basic results from the Wilkinson Microwave
Anisotropy Probe (WMAP) mission. The full nine-year analysis of the time-ordered data …

A groundbreaking text and reference book on twenty-first-century classical physics and its
applications This first-year graduate-level text and reference book covers the fundamental …