We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting
views and insights from all disciplines involved—cosmology, astrophysics, nuclear, and …

We review results from cosmic X-ray surveys of active galactic nuclei (AGNs) over the past
≈ 15≈ 15 years that have dramatically improved our understanding of growing …

We present the results of a semianalytical model that evolves the masses and spins of
massive black holes together with the properties of their host galaxies across the cosmic …

The Hitomi (ASTRO-H) mission is the sixth Japanese x-ray astronomy satellite developed by
a large international collaboration, including Japan, USA, Canada, and Europe. The mission …

We review the current understanding of the Diffuse Gamma-Ray Background (DGRB). The
DGRB is what remains of the total measured gamma-ray emission after the subtraction of the …

Recent X-ray observations show absorbing winds with velocities up to mildly relativistic
values of the order of∼ 0.1 c in a limited sample of six broad-line radio galaxies. They are …

We present a multi-epoch hard X-ray analysis of Cygnus X-1 in its soft state based on four
observations with the Nuclear Spectroscopic Telescope Array (NuSTAR). Despite the basic …

ABSTRACT We report the Fermi Large Area Telescope (LAT) detections of high-energy (>
100 MeV) γ-ray emission from two recent optically bright classical novae, V1369 Centauri …

We introduce GRay, a massively parallel integrator designed to trace the trajectories of
billions of photons in a curved spacetime. This graphics-processing-unit (GPU)-based …

We present results from the coordinated broadband X-ray observations of the extreme
ultraluminous X-ray source Holmberg IX X-1 performed by NuSTAR, XMM-Newton, and …