Results 81 to 90 of about 131,428 (235)
Highest redshift radio galaxies [PDF]
SPIE Proceedings, 2000 At low redshifts powerful radio sources are uniquely associated with massive galaxies, and are thought to be powered by supermassive black holes. Modern 8m -- 10m telescopes may be used used to find their likely progenitors at very high redshifts to study their formation and evolution.
openaire +4 more sources
THE TRIGGERING AND BIAS OF RADIO GALAXIES [PDF]
Multiwavelength AGN Surveys, 2004 We present new results on the clustering and three-dimensional distribution of radio galaxies from the Texas-Oxford NVSS Structure (TONS) survey. The TONS survey was constructed to look at the distribution of radio galaxies in a region of moderate (0 < z < 0.5) redshifts by matching NVSS sources with objects in APM catalogues to obtain a sample ...
Kate Brand +3 more
openaire +3 more sources
Discovery of a new radio galaxy within the error box of the unidentified gamma-ray source 3EG J1735-1500 [PDF]
, 2003 We report the discovery of a new radio galaxy within the location error box of the gamma-ray source 3EG J1735-1500. The galaxy is a double-sided jet source forming a large angle with the line of sight.
Combi, J. A. +4 more
core +3 more sources
The Astrophysical JournalJetted active galactic nuclei (AGN) hosting extended photoionized nebulae provide us with a unique view of the timescales associated with AGN activity. Here, we present a new green bean galaxy at z = 0.304458 ± 0.000007 with large-scale jet-induced radio
Kelly N. Sanderson +6 more
doaj +1 more source
On dynamical models for radio galaxies [PDF]
New Astronomy Reviews, 2002 The tailed radio galaxies that have been called ``Type I'' are not a uniform set. To study their dynamics, we have used the Ledlow-Owen data set, which provides a new sample of 250 radio galaxies in nearby Abell clusters. These sources divide into two clear categories based on their radio morphology.
Frazer N. Owen +4 more
openaire +3 more sources
The environment of active objects in the nearby universe
, 2002 We study the galaxy environment of active galaxies, radio-loud and radio-quiet quasars in the redshift range $0.1\leq z\leq0.25$. We use APM galaxies in order to explore the local galaxy overdensity and the $b_J-R$ colour distribution of neighbouring ...
Abell +24 more
core +2 more sources
High resolution observations and mass modelling of the CLASS gravitational lens B1152+199 [PDF]
, 2001 We present a series of high resolution radio and optical observations of the CLASS gravitational lens system B1152+199 obtained with the Multi-Element Radio-Linked Interferometer Network (MERLIN), Very Long Baseline Array (VLBA) and Hubble Space ...
A. D. Biggs +39 more
core +2 more sources
Powerful Radio Sources in the Southern Sky. II. A Swift X-Ray Perspective
The Astrophysical Journal Supplement Series, 2023 We recently constructed the G4Jy-3CRE, a catalog of extragalactic radio sources based on the GLEAM 4-Jy (G4Jy) sample, with the aim of increasing the number of powerful radio galaxies and quasars with similar selection criteria to those of the revised ...
F. Massaro +20 more
doaj +1 more source
Observation of Radio Galaxies with HAWC [PDF]
Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017), 2017 The High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory is an extensive air shower array located in Puebla, Mexico. The closest radio galaxy within the HAWC field of view, M87, has been detected in very high energies. In this work we report upper limits on the TeV -ray flux of the radio galaxy M87.
Daniel Avila +5 more
openaire +3 more sources
Early Science with the Karoo Array Telescope: a Mini-Halo Candidate in Galaxy Cluster Abell 3667
, 2014 Abell 3667 is among the most well-studied galaxy clusters in the Southern Hemisphere. It is known to host two giant radio relics and a head-tail radio galaxy as the brightest cluster galaxy.
Magnus, L. +4 more
core +1 more source