Results 121 to 130 of about 128,614 (227)

Massive galaxies with very young AGN

, 2007
Gigahertz Peaked Spectrum (GPS) radio galaxies are generally thought to be the young counterparts of classical extended radio sources and live in massive ellipticals.
de Vries, I. A. G. Snellen, M. D. Lehnert, M. N. Bremer, Nathan de Vries, R. T. Schilizzi   +5 more
core   +2 more sources

The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1

The Astrophysical Journal
We investigate the group-scale environment of 15 luminous quasars (luminosity L _3000 > 10 ^46 erg s ^−1 ) from the Cosmic Ultraviolet Baryon Survey (CUBS) at redshift z ≈ 1.
Jennifer I-Hsiu Li, Sean D. Johnson, Erin Boettcher, Sebastiano Cantalupo, Hsiao-Wen Chen, Mandy C. Chen, David R. DePalma, Zhuoqi (Will) Liu, Nishant Mishra, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri S. Zahedy   +13 more
doaj   +1 more source

On the connection between giant radio halos and cluster mergers

, 2010
The frequently observed association between giant radio halos and merging galaxy clusters has driven present theoretical models of non-thermal emission from galaxy clusters, which are based on the idea that the energy dissipated during cluster-cluster ...
Brunetti, Buote, Cassano, Govoni, Jeltema, Markevitch, Maughan, O’Hara, Sarazin, Ventimiglia   +9 more
core   +1 more source

Clustering and light profiles of galaxies in the environment of 20 Ultra Steep Spectrum Radio sources

, 2003
We have analyzed galaxy properties in the neighborhood of 20 Ultra-Steep Spectrum Radio sources (USS) taken from the WISH catalog of De Breuck et al. (2002). Galaxies in these USS fields were identified in deep observations that were carried out in the K'
Bornancini, Carlos G., De Breuck, Carlos, de Vries, Wim, Lambas, Diego G., Martinez, Hector J., Minniti, Dante, van Breugel, Wil   +6 more
core   +2 more sources

Peculiar Galaxies and Radio Sources

Science, 1966
Pairs of radio sources which are separated by from 2° to 6° on the sky have been investigated. In a number of cases peculiar galaxies have been found approximately midway along a line joining the two radio sources. The central peculiar galaxies belong mainly to a certain class in the recently compiled Atlas of Peculiar Galaxies
openaire   +3 more sources

A KAT-7 view of a low-mass sample of galaxy clusters

, 2016
Radio observations over the last two decades have provided evidence that diffuse synchrotron emission in the form of megaparsec-scale radio halos in galaxy clusters is likely tracing regions of the intracluster medium where relativistic particles are ...
Bernardi, G., Brunetti, G., Cassano, R., Cuciti, V., Dallacasa, D., Johnston-Hollitt, M., Oozeer, N., Smirnov, O. M., Venturi, T.   +8 more
core   +1 more source

Circular Mystery: Exploring Diffuse Emission Surrounding a Radio Galaxy with uGMRT and VLA Multiwavelength Observations

The Astrophysical Journal
We report the discovery of J1218+1813, a circular diffuse radio source detected in the Very Large Array (VLA) FIRST survey at 1400 MHz. The source has an angular diameter of approximately one arcminute, corresponding to a physical size of ∼180 kpc, and ...
Shobha Kumari, Sabyasachi Pal, Souvik Manik   +2 more
doaj   +1 more source

The Merging Galaxy Cluster Environment Affects the Morphology of Radio Active Galactic Nuclei

The Astrophysical Journal
It has previously been found that the galaxy cluster environment can affect the fueling and evolution of active galactic nuclei (AGN). This work examines the effect of the merging cluster environment on the properties of radio AGN by comparing the radio ...
Mary Rickel, Emily Moravec, Yjan A. Gordon, Martin J. Hardcastle, Jonathon C. S. Pierce, Lawrence E. Bilton, Ian D. Roberts   +6 more
doaj   +1 more source

Delayed and Fast-rising Radio Flares from an Optical and X-Ray-detected Tidal Disruption Event in the Center of a Dwarf Galaxy

The Astrophysical Journal Letters
AT 2018cqh is a unique tidal disruption event (TDE) discovered in a dwarf galaxy. Both the light-curve fitting and galaxy scaling relationships suggest a central black hole mass in the range of 5.9 < log M _BH / M _☉ < 6.4. The r-band peak luminosity is ∼
Fabao Zhang, Xinwen Shu, Lei Yang, Luming Sun, Zhumao Zhang, Yibo Wang, Guobin Mou, Xue-Guang Zhang, Tianyao Zhou, Fangkun Peng   +9 more
doaj   +1 more source

Cosmological zoom-in simulation of odd radio circles as merger-driven shocks in galaxy groups

Astronomy & Astrophysics
Context. A new class of distinct radio objects, commonly referred to as odd radio circles (ORCs), has been recently discovered. The origin of these features remains unclear because their peculiar properties challenge our current understanding of ...
Ivleva Anna, Böss Ludwig M., Dolag Klaus, Koribalski Bärbel S., Khabibullin Ildar   +4 more
doaj   +1 more source