Results 11 to 20 of about 129,169 (226)

RADIO DETECTION OF RADIO-QUIET GALAXIES [PDF]

The Astronomical Journal, 2008
We investigate the radio emission of ~185,000 quiescent (optically unclassifiable) galaxies selected from the Sloan Digital Sky Survey (SDSS). By median-stacking FIRST cutouts centered on the optically-selected sources, we are able to reach flux densities down to the 10s of microJy.
Hodge, J. A., Becker, R. H., White, R. L., de Vries, W. H.   +3 more
openaire   +2 more sources

Powerful Yet Lonely: Is 3C 297 a High-redshift Fossil Group?

The Astrophysical Journal Supplement Series, 2022
The environment of the high-redshift ( z = 1.408), powerful radio-loud galaxy 3C 297 has several distinctive features of a galaxy cluster. Among them, a characteristic halo of hot gas revealed by Chandra X-ray observations.
Valentina Missaglia, Juan P. Madrid, Mischa Schirmer, Francesco Massaro, Alberto Rodríguez-Ardila, Carlos J. Donzelli, Martell Valencia, Alessandro Paggi, Ralph P. Kraft, Chiara Stuardi, Belinda J. Wilkes   +10 more
doaj   +1 more source

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

Radio galaxies: unification and dust properties [PDF]

New Astronomy Reviews, 2003
The 2002 status of unification models for extragalactic radio sources is examined, with particular emphasis on the dust properties of these objects.
Barthel, P, van Bemmel, I
openaire   +3 more sources

Radio galaxy zoo EMU: towards a semantic radio galaxy morphology taxonomy

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT We present a novel natural language processing (NLP) approach to deriving plain English descriptors for science cases otherwise restricted by obfuscating technical terminology. We address the limitations of common radio galaxy morphology classifications by applying this approach.
Micah Bowles, Hongming Tang, Eleni Vardoulaki, Emma L Alexander, Yan Luo, Lawrence Rudnick, Mike Walmsley, Fiona Porter, Anna M M Scaife, Inigo Val Slijepcevic, Elizabeth A K Adams, Alexander Drabent, Thomas Dugdale, Gülay Gürkan, Andrew M Hopkins, Eric F Jimenez-Andrade, Denis A Leahy, Ray P Norris, Syed Faisal ur Rahman, Xichang Ouyang, Gary Segal, Stanislav S Shabala, O Ivy Wong   +22 more
openaire   +6 more sources

Radio galaxy feedback in X-ray selected groups from COSMOS: the effect on the ICM [PDF]

, 2010
We quantify the importance of the mechanical energy released by radio-galaxies inside galaxy groups. We use scaling relations to estimate the mechanical energy released by 16 radio-AGN located inside X-ray detected galaxy groups in the COSMOS field.
A. Finoguenov, A. M. Koekemoer, A. Oklopčić, Bîrzan, Bîrzan, Condon, D. B. Sanders, D. Pierini, D. Thompson, De Young, Donahue, Drory, Dunkley, E. Schinnerer, Finoguenov, G. W. Pratt, G. Zamorani, Giodini, Gitti, H. Boehringer, Heinz, Ilbert, J. S. Kartaltepe, L. Bîrzan, Leauthaud, Lin, M. Salvato, Markevitch, Peterson, Pratt, Puchwein, R. Massey, Reiprich, S. Giodini, Salvato, Schinnerer, Scoville, Short, Skrutskie, Smolčić, Smolčić, Sun, V. Smolčić, Voit, Wright   +44 more
core   +4 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., Paredes, J. M., Ribo, M., Romero, G. E., Torres, D. F.   +4 more
core   +3 more sources

Radio Galaxy Zoo: A Search for Hybrid Morphology Radio Galaxies

The Astronomical Journal, 2017
Abstract Hybrid morphology radio sources (HyMoRS) are a rare type of radio galaxy that display different Fanaroff–Riley classes on opposite sides of their nuclei. To enhance the statistical analysis of HyMoRS, we embarked on a large-scale search of these sources within the international citizen science project, Radio Galaxy Zoo (RGZ ...
A. D. Kapińska, I. Terentev, O. I. Wong, S. S. Shabala, H. Andernach, L. Rudnick, L. Storer, J. K. Banfield, K. W. Willett, F. de Gasperin, C. J. Lintott, Á. R. López-Sánchez, E. Middelberg, R. P. Norris, K. Schawinski, N. Seymour, B. Simmons   +16 more
openaire   +6 more sources

Nonthermal Emissions from a Head–Tail Radio Galaxy in 3D Magnetohydrodynamic Simulations

The Astrophysical Journal, 2023
We present magnetohydrodynamic simulations of a jet–wind interaction in a galaxy cluster and the radio to gamma-ray and neutrino emissions from this “head–tail galaxy.” Our simulation follows the evolution of cosmic-ray (CR) particle spectra with energy ...
Takumi Ohmura, Katsuaki Asano, Kosuke Nishiwaki, Mami Machida, Haruka Sakemi   +4 more
doaj   +1 more source

Probing gaseous halos of galaxies with radio jets [PDF]

, 2019
Reproduced with permission from Astronomy & Astrophysics. © 2019 ESOContext. Gaseous halos play a key role in understanding inflow, feedback, and the overall baryon budget in galaxies.
Hardcastle, Martin J., Krause, Martin G. H., Shabala, Stanislav S.   +2 more
core   +3 more sources