Results 31 to 40 of about 25,311 (211)

The jet paths of radio active galactic nuclei and their cluster weather [PDF]

Astronomy & Astrophysics
We studied bent radio sources within X-ray galaxy groups in the COSMOS and XMM-LSS fields. The radio data were obtained from the MeerKAT International GHz Tiered Extragalactic Explorations data release 1 (MIGHTEE-DR1) at 1.2-1.3 GHz, with angular ...
E. Vardoulaki, V. Backofer, A. Finoguenov, F. Vazza, J. Comparat, G. Gozaliasl, I. Whittam, C. Hale, J. Weaver, A. Koekemoer, J. Collier, B. Frank, I. Heywood, S. Sekhar, A. R. Taylor, S. Pinjarkar, M. Hardcastle, T. Shimwell, M. Hoeft, S. White, F. An, F. Tabatabaei, Z. Randriamanakoto, M. Filipović   +23 more
semanticscholar   +1 more source

Determining the radio active galactic nuclei contribution to the radio–far-infrared correlation using the black hole Fundamental Plane relation [PDF]

, 2016
We investigate the 1.4 GHz radio properties of 92 nearby ...
O. I. Wong, M. Koss, K. Schawinski, A. Kapińska, I. Lamperti, K. Oh, C. Ricci, S. Berney, B. Trakhtenbrot   +8 more
semanticscholar   +1 more source

Intraday radio variability in active galactic nuclei

New Astronomy Reviews, 1999
Rapid flux density variations on timescales of the order of a day or less (Intraday Variability, IDV) in the radio regime are a common phenomenon within the blazar class. Observations with the 100m telescope of the MPIfR showed that the variations occur not only in total intensity, but also in the polarized intensity and in polarization angle.
Kraus, A., Witzel, A., Krichbaum, T. P.
openaire   +2 more sources

Quasars and active galactic nuclei: high resolution radio imaging. [PDF]

Proceedings of the National Academy of Sciences, 1995
The 12th colloquium in the series organized by the National Academy of Sciences, Quasars and Active Galactic Nuclei: High Resolution Radio Imaging, was held at the NAS Beckman Center in Irvine, California, on March 24 and 25, 1995. The meeting brought together 138 scientists from 17 countries. The majority of the participants were radio astronomers,
Cohen, Marshall H., Kellerman, Kenneth I.   +1 more
openaire   +3 more sources

ARE RADIO ACTIVE GALACTIC NUCLEI POWERED BY ACCRETION OR BLACK HOLE SPIN? [PDF]

, 2010
We compare accretion and black hole spin as potential energy sources for outbursts from active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs).
B. McNamara, B. McNamara, B. McNamara, M. Rohanizadegan, P. Nulsen   +4 more
semanticscholar   +1 more source

The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope: Data Release 3

Astrophysical Journal Supplement Series, 2022
An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data release of the 4FGL catalog based on 12 yr of E > 50 MeV gamma-ray ...
M. Ajello, L. Baldini, J. Ballet, D. Bastieri, J. Becerra González, R. Bellazzini, A. Berretta, E. Bissaldi, R. Bonino, A. Brill, P. Bruel, S. Buson, R. Caputo, P. Caraveo, C. Cheung, G. Chiaro, N. Cibrario, S. Ciprini, M. Crnogorčević, S. Cutini, F. D’Ammando, S. De Gaetano, w sarada, L. Di Venere, A. Domínguez, V. Ramazani, E. Ferrara, A. Fiori, Y. Fukazawa, S. Funk, P. Fusco, V. Gammaldi, F. Gargano, S. Garrappa, D. Gasparrini, N. Giglietto, F. Giordano, M. Giroletti, D. Green, I. Grenier, S. Guiriec, D. Horan, X. Hou, T. Kayanoki, M. Kuss, S. Larsson, L. Latronico, T. Lewis, J. Li, I. Liodakis, F. Longo, F. Loparco, B. Lott, M. Lovellette, P. Lubrano, G. Madejski, S. Maldera, A. Manfreda, G. Martí-Devesa, M. Mazziotta, I. Mereu, P. Michelson, N. Mirabal, W. Mitthumsiri, T. Mizuno, M. Monzani, A. Morselli, I. Moskalenko, M. Negro, R. Ojha, M. Orienti, E. Orlando, J. Ormes, Z. Pei, H. Peña-Herazo, M. Persic, M. Pesce-Rollins, V. Petrosian, R. Pillera, H. Poon, T. Porter, G. Principe, S. Rainò, R. Rando, Babita Rani, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, Lorenzo Scotton, D. Serini, C. Sgro’, E. Siskind, G. Spandre, P. Spinelli, D. Suson, H. Tajima, D. Torres, J. Valverde, H. Yassin, G. Zaharijas   +100 more
semanticscholar   +1 more source

BeppoSAXView of Radio‐loud Active Galactic Nuclei [PDF]

The Astrophysical Journal, 2006
ApJ accepted, 33 pages, 6 ...
Grandi, Paola, Malaguti, Giuseppe, Fiocchi, Mariateresa   +2 more
openaire   +2 more sources

FAINT, EVOLVING RADIO ACTIVE GALACTIC NUCLEI IN SDSS LUMINOUS RED GALAXIES [PDF]

, 2009
We detect and study the properties of faint radio active galactic nuclei (AGNs) in luminous red galaxies (LRGs). The LRG sample comprises 760,000 objects from a catalog of LRG photometric redshifts constructed from the Sloan Digital Sky Survey (SDSS ...
J. Hodge, G. Zeimann, R. Becker, R. Becker, R. White   +4 more
semanticscholar   +1 more source

COSMIC EVOLUTION OF RADIO SELECTED ACTIVE GALACTIC NUCLEI IN THE COSMOS FIELD [PDF]

The Astrophysical Journal, 2009
18 pages, 14 figures, to appear in ...
SmolÄić, V., Zamorani, G., Schinnerer, E., Bardelli, S., Bondi, M., Bîrzan, L., Carilli, C. L., Ciliegi, P., Elvis, M., Impey, C. D., Koekemoer, A. M., Merloni, A., Paglione, T., Salvato, M., Scodeggio, M., Scoville, N., Trump, J. R.   +16 more
openaire   +7 more sources

The many lives of active galactic nuclei–II: The formation and evolution of radio jets and their impact on galaxy evolution [PDF]

, 2017
We describe new efforts to model radio active galactic nuclei (AGN) in a cosmological context using the Semi-Analytic Galaxy Evolution (SAGE) semi-analytic galaxy model.
M. Raouf, S. Shabala, D. Croton, H. Khosroshahi, M. Bernyk   +4 more
semanticscholar   +1 more source