Results 31 to 40 of about 131,428 (235)

Radio Galaxy Zoo: new giant radio galaxies in the RGZ DR1 catalogue [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT In this paper, we present the identification of five previously unknown giant radio galaxies (GRGs) using Data Release 1 of the Radio Galaxy Zoo citizen science project and a selection method appropriate to the training and validation of deep learning algorithms for new radio surveys.
Lawrence Rudnick, Anna M. M. Scaife, Anna M. M. Scaife, Anna D. Kapińska, Stanislav S. Shabala, Nick Seymour, Hongming Tang, O. I. Wong, O. I. Wong, Ray P. Norris, Ray P. Norris   +10 more
openaire   +3 more sources

Radio AGN in spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
Radio AGN in the nearby Universe are more likely to be found in galaxies with early-type morphology, the detection rate in spiral or late-type galaxies (LTGs) being around an order of magnitude lower. We combine the mJy Imaging VLBA Exploration at 20 cm (mJIVE-20) survey with the Sloan Digital Sky Survey, to study the relatively rare population of AGN ...
Kaviraj, Sugata, Shabala, Stanislav S., Deller, Adam T., Middelberg, Enno   +3 more
openaire   +4 more sources

Spectroscopic confirmation of a galaxy cluster associated with 7C1756+6520 at z=1.416 [PDF]

, 2010
We present spectroscopic follow-up of an overdensity of galaxies photometrically selected to be at 1 ...
A. Galametz, Best, C. De Breuck, D. Stern, Daddi, Doherty, Eckart, Eisenhardt, Eisenhardt, F. A. Harrison, Galametz, Galametz, Gawiser, Gladders, Hayashi, Hilton, J. Vernet, Kajisawa, Kodama, Kodama, Lacy, Lidman, Massey, Mullis, Oke, Overzier, Quadri, R. L. Griffith, Rosati, S. A. Stanford, Seymour, Stanford, Stanford, Stern, Stern, Stern, Venemans, Vikhlinin, Wilson   +38 more
core   +2 more sources

Radio Galaxies at TeV Energies

Galaxies, 2022
Unlike blazars, radio galaxies have jets that are misaligned relative to our line-of-sight. This misaligned geometry provides us with a unique view of both the jet and super massive black hole.
Cameron Rulten
doaj   +1 more source

Radio and X-ray Observations of the Restarted Radio Galaxy in the Galaxy Cluster CL 0838+1948

Galaxies, 2021
We present VLA Low-band Ionosphere and Transient Experiment (VLITE) 338 MHz observations of the galaxy cluster CL 0838+1948. We combine the VLITE data with Giant Metrewave Radio Telescope 610 MHz observations and survey data.
Simona Giacintucci, Tracy Clarke, Namir E. Kassim, Wendy Peters, Emil Polisensky   +4 more
doaj   +1 more source

A Nonrepeating Fast Radio Burst in a Dwarf Host Galaxy

The Astrophysical Journal, 2023
We present the discovery of an as yet nonrepeating fast radio burst (FRB), FRB 20210117A, with the Australian Square Kilometre Array Pathfinder (ASKAP), as a part of the Commensal Real-time ASKAP Fast Transients Survey.
Shivani Bhandari, Alexa C. Gordon, Danica R. Scott, Lachlan Marnoch, Navin Sridhar, Pravir Kumar, Clancy W. James, Hao Qiu, Keith W. Bannister, Adam T. Deller, Tarraneh Eftekhari, Wen-fai Fong, Marcin Glowacki, J. Xavier Prochaska, Stuart D. Ryder, Ryan M. Shannon, Sunil Simha   +16 more
doaj   +1 more source

Radio Galaxies at VHE Energies [PDF]

Galaxies, 2018
Radio Galaxies have by now emerged as a new γ-ray emitting source class on the extragalactic sky. Given their remarkable observed characteristics, such as unusual gamma-ray spectra or ultrafast VHE variability, they represent unique examples to probe the nature and physics of active galactic nuclei (AGN) in general.
Frank Rieger, Amir Levinson
openaire   +5 more sources

Multiwavelength Observations of the Second Largest Known FR II Radio Galaxy, NVSS 2146+82 [PDF]

, 2000
We present multi-frequency VLA, multicolor CCD imaging, optical spectroscopy, and ROSAT HRI observations of the giant FR II radio galaxy NVSS 2146+82. This galaxy, which was discovered by the NRAO VLA Sky Survey (NVSS), has an angular extent of nearly 20'
Alan H. Bridle, Berkhuijsen E. M., Christopher Palma, Cotter G., Craig L. Sarazin, Fanaroff B. L., Franz E. Bauer, Green P. J., Lacy M., Longair M. S., Miller N. A., Mukai K., Parma P., Prestage R. M., Saripalli L., Steven R. Majewski, Strom R. G., Subrahmanyan R., Taylor D., William D. Cotton, Willis A. G.   +20 more
core   +2 more sources

IGR J14488-4008: an X-ray peculiar giant radio galaxy discovered by INTEGRAL [PDF]

, 2015
In this paper we report the discovery and detailed radio/X-ray analysis of a peculiar giant radio galaxy (GRG) detected by INTEGRAL, IGR J14488-4008. The source has been recently classified as a Seyfert 1.2 galaxy at redshift 0.123; the radio data denote
Bassani, Loredana, Bird, Antony J., Dallacasa, Daniele, Lal, Dharam Vir, Malizia, Angela, Molina, Manuela, Ubertini, Pietro, Venturi, Tiziana   +7 more
core   +2 more sources

X-ray and Radio Observations of the Radio Relic Galaxy Clusters 1RXS J0603.3+4214 and RXC J1053.7+5453

Galaxies, 2018
We study two galaxy clusters with radio relics, 1RXS J0603.3+4214 and RXC J1053.7+5453, through X-ray and radio observations. Radio relics are diffuse non-thermal radio sources found in outskirts of galaxy clusters.
Motokazu Takizawa
doaj   +1 more source