We review sterile neutrinos as possible Dark Matter candidates. After a short summary on
the role of neutrinos in cosmology and particle physics, we give a comprehensive overview …

We use a combined 1.2 Ms of NuSTAR observations of M31 to search for x-ray lines from
sterile neutrino dark matter decay. For the first time in a NuSTAR analysis, we consistently …

This white paper discusses the current landscape and prospects for experiments sensitive to
particle dark matter processes producing photons and cosmic rays. Much of the gamma-ray …

We analyze two dedicated NuSTAR observations with exposure∼ 190 ks located∼ 1 0°
from the Galactic plane, one above and the other below, to search for x-ray lines from the …

The radiative cooling time of the hot gas at the centres of cool cores in clusters of galaxies
drops down to 10 Myr and below. The observed mass cooling rate of such gas is very low …

Microcalorimeters have shown remarkable success in delivering high-spectral-resolution
observations of the hot and energetic Universe, and have paved the way to revolutionary …

The Hitomi results on the Perseus cluster have led to improvements in our knowledge of
atomic physics that are crucial for the precise diagnostic of hot astrophysical plasma …

Relevant uncertainties of theoretical atomic data are vital to determining the accuracy of
plasma diagnostics in a number of areas, including, in particular, the astrophysical study. We …

Spatially compact stellar profiles and old stellar populations have established compact
elliptical galaxies (CEGs) as local analogs of the high-redshift" red nuggets" thought to …

The nondetection of a coma surrounding 1I/'Oumuamua, the first discovered interstellar
object (ISO), has prompted a variety of hypotheses to explain its nongravitational …