The universe's biggest galaxies have both vast atmospheres and supermassive central
black holes. This article reviews how those two components of a large galaxy couple and …

In a growing number of galaxy clusters diffuse extended radio sources have been found.
These sources are not directly associated with individual cluster galaxies. The radio …

We review several current aspects of dark matter theory and experiment. We overview the
present experimental status, which includes current bounds and recent claims and hints of a …

Understanding the physical mechanisms that control galaxy formation is a fundamental
challenge in contemporary astrophysics. Recent advances in the field of astrophysical …

Most of the celestial γ rays detected by the Large Area Telescope (LAT) on board the Fermi
Gamma-ray Space Telescope originate from the interstellar medium when energetic cosmic …

The indirect detection of dark matter annihilation and decay using observations of photons,
charged cosmic rays and neutrinos offers a promising means of identifying the particle …

The possible gamma-ray excess in the inner Galaxy and the Galactic center (GC) suggested
by Fermi-LAT observations has triggered a large number of studies. It has been interpreted …

In recent years, observations of the Sunyaev-Zeldovich (SZ) effect have had significant
cosmological implications and have begun to serve as a powerful and independent probe of …

A critical review of the standard paradigm for the origin of Galactic cosmic rays (CRs) is
presented. Recent measurements of local and far-away CRs reveal unexpected behaviors …

This article gives an overview of the constitution, physical conditions, and observables of
dust in the interstellar medium of nearby galaxies. We first review the macroscopic, spatial …