Results 31 to 40 of about 62,437 (252)

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.
Mojtaba Raouf, S. Shabala, D. Croton, H. Khosroshahi, M. Bernyk   +4 more
semanticscholar   +1 more source

Galaxy Evolution in the Radio Band: The Role of Star-forming Galaxies and Active Galactic Nuclei [PDF]

, 2017
We investigate the astrophysics of radio-emitting star-forming galaxies and active galactic nuclei (AGNs) and elucidate their statistical properties in the radio band, including luminosity functions, redshift distributions, and number counts at sub-mJy ...
C. Mancuso, A. Lapi, I. Prandoni, I. Obi, J. González-Nuevo, F. Perrotta, A. Bressan, A. Celotti, L. Danese   +8 more
semanticscholar   +1 more source

Radio sources in the Chandra Galactic Bulge Survey [PDF]

, 2012
We discuss radio sources in the Chandra Galactic Bulge Survey region. By cross-matching the X-ray sources in this field with the NRAO VLA Sky Survey archival data, we find 12 candidate matches.
Britt, Christopher B. T., Greiss, Sandra, Hynes, R. I., Jonker, P. G., Maccarone, T. J., Nelemans, G., Steeghs, D., Torres, M. A. P., Wijnands, R.   +8 more
core   +4 more sources

Observational Tests of Active Galactic Nuclei Feedback: An Overview of Approaches and Interpretation [PDF]

Galaxies
Growing supermassive black holes (Active Galactic Nuclei; AGN) release energy with the potential to alter their host galaxies and larger-scale environment; a process named “AGN feedback”.
C. Harrison, C. Ramos Almeida
semanticscholar   +1 more source

Compact radio cores in radio-quiet active galactic nuclei [PDF]

, 2016
Context. The mechanism of radio emission in radio-quiet (RQ) active galactic nuclei (AGNs) is still debated and might arise from the central AGN, from star formation activity in the host, or from either of these sources. A direct detection of compact and
Alessandro Maini, I. Prandoni, R. Norris, G. Giovannini, L. Spitler   +4 more
semanticscholar   +1 more source

Recurrent radio activity in active galactic nuclei

EPJ Web of Conferences, 2012
There has been a growing body of persuasive evidence to indicate that AGN activity, powered by mass accretion onto a supermassive black hole, can involve multiple episodes.
Jamrozy M.
doaj   +1 more source

Radio and X-ray Observations of the Restarted Radio Galaxy in the Galaxy Cluster CL 0838+1948

Galaxies, 2021
We present VLA Low-band Ionosphere and Transient Experiment (VLITE) 338 MHz observations of the galaxy cluster CL 0838+1948. We combine the VLITE data with Giant Metrewave Radio Telescope 610 MHz observations and survey data.
Simona Giacintucci, Tracy Clarke, Namir E. Kassim, Wendy Peters, Emil Polisensky   +4 more
doaj   +1 more source

Millimeter-Wave Monitoring of Active Galactic Nuclei with the Africa Millimetre Telescope

Galaxies, 2019
Active galactic nuclei are the dominant sources of gamma rays outside our galaxy and are also candidates for the source of ultra-high energy cosmic rays.
Michael Backes, Markus Böttcher, Heino Falcke   +2 more
doaj   +1 more source

MOMO. VI. Multifrequency Radio Variability of the Blazar OJ 287 from 2015 to 2022, Absence of Predicted 2021 Precursor-flare Activity, and a New Binary Interpretation of the 2016/2017 Outburst

The Astrophysical Journal, 2023
Based on our dedicated Swift monitoring program, MOMO, OJ 287 is one of the best-monitored blazars in the X-ray–UV–optical regime. Here, we report results from our accompanying, dense, multifrequency (1.4–44 GHz) radio monitoring of OJ 287 between 2015 ...
S. Komossa, A. Kraus, D. Grupe, A. G. Gonzalez, M. A. Gurwell, L. C. Gallo, F. K. Liu, I. Myserlis, T. P. Krichbaum, S. Laine, U. Bach, J. L. Gómez, M. L. Parker, S. Yao, M. Berton   +14 more
doaj   +1 more source

The Past and Future of East Asia to Italy: Nearly Global VLBI

Galaxies, 2023
We present here the East Asia to Italy Nearly Global VLBI (EATING VLBI) project. How this project started and the evolution of the international collaboration between Korean, Japanese, and Italian researchers to study compact sources with VLBI ...
Gabriele Giovannini, Yuzhu Cui, Kazuhiro Hada, Kunwoo Yi, Hyunwook Ro, Bong Won Sohn, Mieko Takamura, Salvatore Buttaccio, Filippo D’Ammando, Marcello Giroletti, Yoshiaki Hagiwara, Motoki Kino, Evgeniya Kravchenko, Giuseppe Maccaferri, Alexey Melnikov, Kotaro Niinuma, Monica Orienti, Kiyoaki Wajima, Kazunori Akiyama, Akihiro Doi, Do-Young Byun, Tomoya Hirota, Mareki Honma, Taehyun Jung, Hideyuki Kobayashi, Shoko Koyama, Andrea Melis, Carlo Migoni, Yasuhiro Murata, Hiroshi Nagai, Satoko Sawada-Satoh, Matteo Stagni   +31 more
doaj   +1 more source