This review describes recent developments related to the unified model of active galactic
nuclei (AGNs). It focuses on new ideas about the origin and properties of the central …

Since more than 70 years ago, the colours of galaxies derived from flux measurements at
different wavelengths have been used to estimate their cosmological distances. Such …

The concordance model (Λ cold dark matter (Λ CDM) model, where Λ is the cosmological
constant) reproduces the main current cosmological observations,,–assuming the validity of …

Context. Feedback from accreting supermassive black holes (SMBHs) is often identified as
the main mechanism responsible for regulating star formation in active galactic nucleus …

Quasar feedback in the form of powerful outflows is invoked as a key mechanism to quench
star formation in galaxies, although direct observational evidence is still scarce and debated …

We study the properties of black holes and their host galaxies across cosmic time in the
Illustris simulation. Illustris is a large-scale cosmological hydrodynamical simulation which …

ABSTRACT The Wide-field Infrared Survey Explorer (WISE) is an extremely capable and
efficient black hole finder. We present a simple mid-infrared color criterion, W1− W2⩾ 0.8 …

We present new measurements of the evolution of the X-ray luminosity functions (XLFs) of
unabsorbed and absorbed active galactic nuclei (AGNs) out to z∼ 5. We construct samples …

We present 3D-HST, a near-infrared spectroscopic Treasury program with the Hubble Space
Telescope for studying the physical processes that shape galaxies in the distant universe …

Massive black holes (BHs) are at once exotic and yet ubiquitous, residing at the centers of
massive galaxies in the local Universe. Recent years have seen remarkable advances in …