We review current understanding of the population of radio galaxies and radio-loud quasars
from an observational perspective, focusing on their large-scale structures and dynamics …

Compact steep-spectrum (CSS) and peaked-spectrum (PS) radio sources are compact,
powerful radio sources. The multi-frequency observational properties and current theories …

The present white paper is submitted as part of the “Snowmass” process to help inform the
long-term plans of the United States Department of Energy and the National Science …

The relative positions of the high and low surface brightness regions of radio-loud active
galaxies in the 3CR sample were found by Fanaroff and Riley to be correlated with their …

The co-evolution between supermassive black holes and their environment is most directly
traced by the hot atmospheres of dark matter halos. The cooling of the hot atmosphere …

Over the past decade, several works have used the ratio between total (rest 8− 1000 μm)
infrared and radio (rest 1.4 GHz) luminosity in star-forming galaxies (q IR), often referred to …

The LOFAR Two-metre Sky Survey (LoTSS) will cover the full northern sky and, additionally,
aims to observe the LoTSS deep fields to a noise level of≲ 10 μJy beam− 1 over several …

Radio-loud compact radio sources (CRSs) are characterised by morphological compactness
of the jet structure centred on the active nucleus of the galaxy. Most of the local elliptical …

Neutral hydrogen (H i) is the primary component of the cool interstellar medium (ISM) and is
the reservoir of fuel for star formation. Owing to the sensitivity of existing radio telescopes …

Context. Apertif is a phased-array feed system for the Westerbork Synthesis Radio
Telescope, providing forty instantaneous beams over 300 MHz of bandwidth. A dedicated …