Results 11 to 20 of about 102,596 (294)

The Dynamics of Radio Galaxies and Double-Double Radio Galaxies [PDF]

Journal of Astrophysics and Astronomy, 2013
Relativistic and magnetised plasma ejected by radio loud AGNs through jets form the diffuse lobes of radio galaxies. The radiating particles (electron/electron-positron) in lobes emit in radio via the synchrotron process and X-ray via inverse-Compton ...
Croston, J. H., Hardcastle, M. J., Jamrozy, M., Konar, C., Machalski, J., Nandi, S., Saikia, D. J.   +6 more
core   +5 more sources

Radio Galaxy Zoo: The Distortion of Radio Galaxies by Galaxy Clusters [PDF]

The Astronomical Journal, 2019
We study the impact of cluster environment on the morphology of a sample of 4304 extended radio galaxies from Radio Galaxy Zoo. A total of 87% of the sample lies within a projected 15 Mpc of an optically identified cluster.
Andernach, Heinz, de Gasperin, Francesco, Garon, Avery F., Jones, Tom W., Kapińska, Anna D., Kim, Jin-Ah, Norris, Ray P., Rudnick, Lawrence, Shabala, Stanislav S., Tang, Hongming, Tate, Jean, Wong, O. Ivy   +11 more
core   +5 more sources

RADIO GALAXIES [PDF]

Soviet Physics Uspekhi, 1962
I.S. Shklovskii
openalex   +3 more sources

RADIO SOURCES, GALAXIES, AND CLUSTERS OF GALAXIES [PDF]

Proceedings of the National Academy of Sciences, 1963
The identification of radio sources at high galactic latitudes has progressed to a stage at which it is possible to make the first tentative attempts at a statistical exploration of the results. The identification of the source 3C 48 shows that galactic sources may occur at high galactic latitudes, but the results of the determination of diameters of ...
R. Minkowski
openalex   +3 more sources

Radio Galaxy Zoo: A Search for Hybrid Morphology Radio Galaxies [PDF]

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 ...
Ray P. Norris, Ray P. Norris, Chris Lintott, Kevin Schawinski, Enno Middelberg, Julie Banfield, Stanislav S. Shabala, O. I. Wong, Lawrence Rudnick, Anna D. Kapińska, F. de Gasperin, Brooke Simmons, Brooke Simmons, Kyle W. Willett, Nick Seymour, Lucas Storer, Heinz Andernach, Angel R. Lopez-Sanchez, Angel R. Lopez-Sanchez, Ivan Terentev   +19 more
openaire   +7 more sources

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.
W. H. de Vries, W. H. de Vries, Robert H. Becker, Robert H. Becker, Jacqueline Hodge, Richard L. White   +5 more
openaire   +4 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   +5 more sources

On the environments of giant radio galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT We test the hypothesis that environments play a key role in enabling the growth of enormous radio structures spanning more than 700 kpc, an extreme population of radio galaxies called giant radio galaxies (GRGs). To achieve this, we explore (1) the relationships between the occurrence of GRGs and the surface number density of ...
Ting-Wen Lan 藍鼎文, J. Xavier Prochaska, J. Xavier Prochaska   +2 more
openaire   +3 more sources

The triggering probability of radio-loud AGN: A comparison of high and low excitation radio galaxies in hosts of different colors [PDF]

, 2012
Low luminosity radio-loud active galactic nuclei (AGN) are generally found in massive red elliptical galaxies, where they are thought to be powered through gas accretion from their surrounding hot halos in a radiatively inefficient manner.
Abazajian, Baldwin, Balogh, Becker, Best, Best, Best, Best, Brinchmann, Condon, Croton, Evans, H. J. A. Röttgering, Hardcastle, Hickox, J. Brinchmann, Kauffmann, Kauffmann, Kauffmann, Martin, Matthews, P. N. Best, R. M. J. Janssen, Schmidt, Stoughton, Strateva, Strauss, Tadhunter, Tasse, Whysong, York   +30 more
core   +3 more sources

The Environments of Radio Galaxies [PDF]

Symposium - International Astronomical Union, 1996
In the unified schemes of AGNs BL Lac objects are believed to be Fanaroff-Riley (FR) type I radio galaxies with a relativistic jet aligned to the observer's line of sight (e.g. Urry & Padovani 1995). Kollgaard et al. (1992) and Owen et al. (1995) suggest some FR II sources can also be BL Lac parents. Clearly, isotropic properties such as the galaxy
G. Fasano, R. Scarpa, Joseph E. Pesce, R. Falomo   +3 more
openaire   +2 more sources