Results 111 to 120 of about 39,820 (206)

A Morphological Identification and Study of Radio Galaxies from LoTSS DR2. I. The “Winged” Radio Galaxies

The Astrophysical Journal Supplement Series
We conducted an extensive identification and analysis of various morphological classes and subclasses of radio galaxies using the latest high-resolution data from the second data release of the LOFAR Two-metre Sky Survey.
Soumen Kumar Bera, Taotao Fang, Tapan K. Sasmal, M. Kunert-Bajraszewska, Xuelei Chen, Soumen Mondal   +5 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

Recognizing Blazars Using Radio Morphology from the VLA Sky Survey

The Astrophysical Journal
Blazars are radio-loud active galactic nuclei whose jets have a very small angle to our line of sight. Observationally, the radio emissions are mostly compact or compact-core with a one-sided jet.
Zhang-Liang Xie, Eduardo Bañados, Silvia Belladitta, Chiara Mazzucchelli, Jan-Torge Schindler, Frederick Davies, Bram P. Venemans   +6 more
doaj   +1 more source

The Evolution of Radio Loud Active Galactic Nuclei as a Function of Black Hole Spin

, 2010
Recent work on the engines of active galactic nuclei jets suggests their power depends strongly and perhaps counter-intuitively on black hole spin. We explore the consequences of this on the radio-loud population of active galactic nuclei and find that ...
Allen, Antonuccio-Delogu, Barnes, Baum, Beloborodov, Benson, Berti, Bicknell, Blandford, Blandford, Blandford, Blum, Bogovalov, Brenneman, Bridle, Cao, D. A. Evans, D. Garofalo, Daly, Daly, De Young, Donato, Evans, Evans, Fabian, Fanaroff, Ferrarese, Garofalo, Garofalo, Gebhardt, Ghisellini, Gopal-Krishna, Grandi, Hardcastle, Hardcastle, Hardee, Heywood, Hughes, Kaiser, King, King, Kormendy, Kormendy, Kuncic, Kuncic, Magorrian, Mangalam, Marchesini, Marconi, McClintock, McKinney, McKinney, McKinney, McNamara, Meier, Meier, Meier, Miller, Moderski, Moderski, Nakamura, Narayan, Neilsen, Nemmen, Nesvadba, Novikov, O'Dea, Ogle, R. M. Sambruna, Rees, Reeves, Reeves, Reynolds, Reynolds, Reynolds, Sambruna, Smolcic, Smolcic, Tchekhovskoy, Tchekhovskoy, Thorne, Tremaine, Volonteri, Wilms, Wilson, Zoghbi   +85 more
core   +1 more source

Fast radio bursts in the discs of active galactic nuclei

Monthly Notices of the Royal Astronomical Society
ABSTRACT Fast radio bursts (FRBs) are luminous millisecond-duration radio pulses with extragalactic origin, which were discovered more than a decade ago. Despite the numerous samples, the physical origin of FRBs remains poorly understood. FRBs have been thought to originate from young magnetars or accreting compact objects (COs). Massive
Z Y Zhao, K Chen, F Y Wang, Zi-Gao Dai
openaire   +2 more sources

The Role of Starbursts in the Formation of Galaxies & Active Galactic Nuclei

, 1999
Starbursts are episodes of intense star-formation in the central regions of galaxies, and are the sites of roughly 25% of the high-mass star-formation in the local universe.
Buat V., C. S. Frenk, Dunlop J., S. D. M. White, Schmitt H., Timothy Heckman   +5 more
core   +1 more source

VaDAR: Varstrometry for Dual AGN Using Radio Interferometry

The Astrophysical Journal
Binary and dual active galactic nuclei (AGNs) are an important observational tool for studying the formation and dynamical evolution of galaxies and supermassive black holes.
Emma Schwartzman, Tracy E. Clarke, Kristina Nyland, Nathan J. Secrest, Ryan W. Pfeifle, Henrique Schmitt, Shobita Satyapal, Barry Rothberg   +7 more
doaj   +1 more source

What Powers the Compact Radio Emission in Nearby Elliptical and S0 Galaxies?

, 1998
Many nearby early-type (elliptical and S0) galaxies contain weak (milli-Jansky level) nuclear radio sources on scales a few hundred parsecs or less. The origin of the radio emission, however, has remained unclear, especially in volume-limited samples ...
Akritas M. G., de Bruyn A. G., Ekers R. D., Fanaroff B. L., Heckman T. M., Heeschen D. S., Hine R. G., Hummel E., Luis C. Ho, Rawlings S., Sadler E. M., Sadler E. M., Slee O. B.   +12 more
core   +1 more source

Radio Properties of Low Redshift Broad Line Active Galactic Nuclei Including Extended Radio Sources

, 2010
We present a study of the extended radio emission in a sample of 8434 low redshift (z < 0.35) broad line active galactic nuclei (AGN) from the Sloan Digital Sky Survey (SDSS).
Antonucci, Bentz, Blandford, Chiaberge, Cirasuolo, D. Michael Crenshaw, Elvis, Fanaroff, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna & Wiita, Greene, Ho, Ivezić, Ivezić, Kaspi, Kaspi, Kawakatu, Laor, Laor, Osterbrock, Paul J. Wiita, Peterson, Rafter, Rafter, Saripalli, Sikora, Spergel, Stephen E. Rafter, White   +29 more
core   +1 more source

Do All the Quasars and High-excitation Radio Galaxies (HERGs) in the 3CRR Catalog Contain a Magnetically Arrested Disk (MAD)?

The Astrophysical Journal
Based on the magnetization, an accretion disk with a large-scale magnetic field can be separated into either standard and normal evolution or magnetically arrested disk (MAD), which are difficult to identify from observations. It is still unclear whether
Shuang-Liang Li, Wenwen Zuo, Xinwu Cao
doaj   +1 more source