Results 131 to 140 of about 62,437 (252)

Gamma-ray emission from AGNs

, 2010
Blazars, radio-loud active galactic nuclei with the relativistic jet closely aligned with the line of sight, dominate the extragalactic sky observed at gamma-ray energies, above 100 MeV.
Abdo A. A., F. TAVECCHIO
core   +1 more source

Radio galaxies with a 'double-double morphology'- I. Analysis of the radio properties and evidence for interrupted activity in active galactic nuclei [PDF]

, 2000
A. P. Schoenmakers, A. G. de Bruyn, H. J. A. Röttgering, H. van der Laan, Christian Kaiser   +4 more
openalex   +1 more source

Constraining Star Formation in M87 Using Deep Hubble Space Telescope UV Data

The Astrophysical Journal
We analyzed the deepest Hubble Space Telescope F275W ultraviolet (UV) imaging of M87 to obtain the most robust constraints on its star formation rate (SFR) and star formation history (SFH).
Prathamesh Tamhane, William Waldron, Ming Sun, Silvia Martocchia, Claudia Maraston, Alessandro Boselli, William Forman, Massimo Gaspari, Juhi Tiwari, Megan Donahue, G. Mark Voit, Tim Edge, Grant Tremblay, Daniel Thomas   +13 more
doaj   +1 more source

Implications of pc and kpc jet asymmetry to the cosmic ray acceleration

, 2012
We probe the role that the directional asymmetry, between relativistic outflows and kilo-parsec scale jets, play in the acceleration of cosmic rays. For this reason we use two powerful, nearby Active Galactic Nuclei (AGNs).
Abraham J., Aharonian F. A., Enβlin T., Enβlin T. A., Gizani N. A. B., Hardcastle M. J., Miller N. A., Saripalli L., van Breugel W. J. M., Zatsepin G. T.   +9 more
core   +1 more source

Radio-loud active galactic nuclei and theL_X-σ relation of galaxy groups and clusters [PDF]

, 2008
Shiyin Shen, Guinevere Kauffmann, Anja von der Linden, Simon D. M. White, P. N. Best   +4 more
openalex   +1 more source

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +1 more source

The connection between radio and Very High Energy in Active Galactic Nuclei: perspectives with CTA, the Cherenkov Telescope Array [PDF]

, 2016
Hélène Sol
openalex   +1 more source

Revisiting Radio Variability of the Blazar 3C 454.3

The Astrophysical Journal
We examine lengthy radio light curves of the flat spectrum radio galaxy 3C 454.3 for possible quasiperiodic oscillations (QPOs). The data used in this work were collected at five radio frequencies, 4.8, 8.0, 14.5, 22.0, and 37.0 GHz between 1979 and 2013
Ashutosh Tripathi, Alok C. Gupta, Krista Lynne Smith, Paul J. Wiita, Margo F. Aller, Alexandr E. Volvach, Anne Lähteenmäki, Hugh D. Aller, Merja Tornikoski, Larisa N. Volvach   +9 more
doaj   +1 more source

On the occupation of X-ray-selected galaxy groups by radio active galactic nuclei since z = 1.3 [PDF]

, 2011
V Smolcić, A. Finoguenov, G. Zamorani, E. Schinnerer, M Tanaka, S. Giodini, N. Scoville   +6 more
openalex   +1 more source

Optical Singly-Ionized Iron Emission in Radio-Quiet and Relativistically Jetted Active Galactic Nuclei [PDF]

, 2021
P. Marziani, M. Berton, Swayamtrupta Panda, E. Bon   +3 more
openalex   +1 more source