Results 31 to 40 of about 23,272 (235)

Search and Characterization of Remnant Radio Galaxies in the XMM-LSS Deep Field

The Astrophysical Journal, 2023
The remnant phase of a radio galaxy is characterized by the cessation of active galactic nuclei activity, resulting in the jets ceasing to feed plasma to the radio lobes.
Sushant Dutta, Veeresh Singh, C. H. Ishwara Chandra, Yogesh Wadadekar, Abhijit Kayal, Ian Heywood   +5 more
doaj   +1 more source

The Radio Spectra of High-luminosity Compact Symmetric Objects: Implications for Studies of Compact Jetted Active Galactic Nuclei

The Astrophysical Journal
This paper addresses, for the first time, a key aspect of the phenomenology of compact symmetric objects (CSOs): the characteristics of their radio spectra.
P. V. de la Parra, A. C. S Readhead, T. Herbig, S. Kiehlmann, M. L. Lister, V. Pavlidou, R. A. Reeves, A. Siemiginowska, A. G. Sullivan, T. Surti, A. Synani, K. Tassis, G. B. Taylor, P. N. Wilkinson, M. F. Aller, R. D. Blandford, N. Globus, C. R. Lawrence, B. Molina, S. O’Neill, T. J. Pearson   +20 more
doaj   +2 more sources

The Rapid Optical Variability of the Nearby Radio-loud AGN Pictor A: Introducing the Quaver Pipeline for AGN Science with TESS

The Astrophysical Journal, 2023
The sampling strategy of the Transiting Exoplanet Survey Satellite (TESS) makes TESS light curves extremely valuable for investigating the high cadence optical variability of active galactic nuclei (AGN).
Krista Lynne Smith, Lia F. Sartori
doaj   +1 more source

A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei [PDF]

Universe, 2022
We considered the fourth catalog of gamma-ray point sources produced by the Fermi Large Area Telescope (LAT) and selected only jetted active galactic nuclei (AGN) or sources with no specific classification, but with a low-frequency counterpart. Our final
L. Foschini, M. Lister, H. Andernach, S. Ciroi, P. Marziani, S. Antón, M. Berton, E. Dalla Bontà, E. Järvelä, M. Marchã, P. Romano, M. Tornikoski, S. Vercellone, A. Vietri   +13 more
semanticscholar   +1 more source

FRAMEx. IV. Mechanical Feedback from the Active Galactic Nucleus in NGC 3079

The Astrophysical Journal, 2023
Using the Very Long Baseline Array, we observed the active galactic nucleus (AGN) in NGC 3079 over a span of six months to test for variability in the two main parsec-scale radio components, A and B , which lie on either side of the AGN.
Luis C. Fernandez, Nathan J. Secrest, Megan C. Johnson, Travis C. Fischer   +3 more
doaj   +1 more source

Active Galactic Nuclei as Potential Sources of Ultra-High Energy Cosmic Rays [PDF]

Universe, 2022
Active Galactic Nuclei (AGNs) and their relativistic jets belong to the most promising class of ultra-high-energy cosmic ray (UHECR) accelerators. This compact review summarises basic experimental findings by recent instruments, and discusses possible ...
F. Rieger
semanticscholar   +1 more source

The X-ray emission in young radio active galactic nuclei

Monthly notices of the Royal Astronomical Society, 2020
In this work, we investigated the X-ray emission for a sample of young radio active galactic nuclei (AGNs) by combining data from Chandra/XMM–Newton with data for other wavebands.
M. Liao, M. Gu, Minhua Zhou, Liang Chen
semanticscholar   +1 more source

Delayed triggering of radio Active Galactic Nuclei in gas-rich minor mergers in the local Universe [PDF]

, 2016
We examine the processes triggering star formation and active galactic nucleus (AGN) activity in a sample of 25 low-redshift (z 107 K) brightness temperature required for an mJIVE-20 detection allows us to unambiguously identify the radio AGN in our ...
S. Shabala, A. Deller, S. Kaviraj, E. Middelberg, R. Turner, Y. Ting, J. Allison, T. Davis   +7 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

15-GHz radio emission from nearby low-luminosity active galactic nuclei [PDF]

Astronomy & Astrophysics, 2018
We present a sub-arcsec resolution radio imaging survey of a sample of 76 low-luminosity active galactic nuclei (LLAGN) that were previously not detected with the Very Large Array at 15 GHz.
P. Saikia, Elmar Kording, D. Coppejans, H. Falcke, David R. Williams, R. D. Baldi, I. McHardy, R. Beswick   +7 more
semanticscholar   +1 more source