Results 81 to 90 of about 37,310 (215)

Kiloparsec-Scale Jets in FR I Radio Galaxies and the Gamma-Ray Background

, 2005
We discuss the contribution of kiloparsec-scale jets in FR I radio galaxies to the diffuse gamma-ray background radiation. The analyzed gamma-ray emission comes from inverse-Compton scattering of starlight photon fields by the ultrarelativistic electrons
Aharonian F., Bloom E. D., Falle S. A. E. G., J. Kataoka, Komissarov S. S., Nikishov A. I., Padovani P., Parma P., Protheroe R. J., Protheroe R. J., T. M. Kneiske, Weferling B., Ł. Stawarz   +12 more
core   +1 more source

Extragalactic radio sources [PDF]

The standard model for extragalactic variable radio sources comprises an isotropically expanding plasmoid with frozen magnetic flux and an electron distribution which evolves adiabatically.
Sturrock, P. A.
core   +1 more source

The Variability of Persistent Radio Sources of Fast Radio Bursts

The Astrophysical Journal
Over 700 bright millisecond-duration radio transients, known as fast radio bursts (FRBs), have been identified to date. Nevertheless, the origin of FRBs remains unknown.
Ai Yuan Yang, Yi Feng, Chao-Wei Tsai, Di Li, Hui Shi, Pei Wang, Yuan-Pei Yang, Yong-Kun Zhang, Chen-Hui Niu, Ju-Mei Yao, Yu-Zhu Cui, Ren-Zhi Su, Xiao-Feng Li, Jun-Shuo Zhang, Yu-Hao Zhu, W. D. Cotton   +15 more
doaj   +1 more source

Gamma rays from extragalactic radio sources [PDF]

It is proposed that the important connection between 3C 273 and 3C 279, the first two extragalactic sources detected at greater than 100 MeV energies, is their superluminal nature.
Dermer, Charles D., Mastichiadis, Apostolos, Schlickeiser, Reinhard   +2 more
core   +1 more source

Faint Gigahertz peaked spectrum sources and the evolution of young radio sources

, 1998
GPS sources are the objects of choice to study the initial evolution of extragalactic radio sources, since it is most likely that they are the young counterparts of large scale radio sources.
Bremer, M. N., Miley, G. K., Rottgering, H. J. A., Schilizzi, R. T., Snellen, I. A. G., van Langevelde, H. J.   +5 more
core   +1 more source

Predictions for high-frequency radio surveys of extragalactic sources

, 2004
We present detailed predictions of the contributions of the various source populations to the counts at frequencies of tens of GHz. New evolutionary models are worked out for flat-spectrum radio quasars, BL Lac objects, and steep-spectrum sources. Source
Aghanim, Agol, Aitken, Allen, Argüeso, Baganoff, Barbosa, Bennett, Blandford, Bondi, Bryan, Carlstrom, Chapman, Ciardi, Colafrancesco, Condon, D. Mesa, Dallacasa, Dawson, De Zotti, Di Matteo, di Matteo, Dunlop, Dupac, Eke, Ettori, Fabian, Fanti, Fomalont, G. De Zotti, Galliano, Garrett, Gavazzi, Gehrels, Gnedin, Grainge, Granato, Granato, Gregory, Gregory, Gruppioni, Helou, Herranz, Holder, Ikebe, Ikeuchi, J. González-Nuevo, Jackson, Komatsu, Kovac, Kühr, L. Silva, L. Toffolatti, Lapi, Martínez-González, Mason, Massardi, Morganti, Mészáros, Natarajan, Natarajan, O'Dea, Oh, P. Mazzotta, Pauliny-Toth, Pauliny-Toth, Peacock, Perna, Pierpaoli, Pierpaoli, Platania, Polatidis, R. Ricci, Readhead, Rees, Rees, Refregier, Rosa-González, Sadler, Seaton, Sheth, Silva, Snellen, Sunyaev, Taylor, Taylor, Toffolatti, Toffolatti, Trushkin, Tschager, Vielva, Waldram, Waxman, White, Wijers   +94 more
core   +1 more source

A Deep VLA Search for a Persistent Radio Counterpart to the One-off FRB 20250316A

The Astrophysical Journal Letters
Fast radio burst (FRB) 20250316A, detected by CHIME on 2025 March 16 with a fluence of 1.7 ± 0.1 kJy ms and a dispersion measure of 161.3 ± 0.4 pc cm ^−3 , ranks among the brightest extragalactic FRBs at ∼40 Mpc. We obtain deep Karl G.
Tao An, Ailing Wang, Yu-Chen Huang, Jia-Pei Feng, Yuanqi Liu, Zhongli Zhang, Zi-Gao Dai   +6 more
doaj   +1 more source

Identification of the Early Fermi LAT Gamma-Ray Bright Objects with Extragalactic VLBI sources

, 2009
A list of 205 gamma-ray strong objects was reported recently as a result of a 3-month integration with the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope.
Abdo, Abdo, Atwood, Bassani, Beasley, Fey, Fomalont, Fomalont, Hartman, Healey, Healey, Helmboldt, Kovalev, Kovalev, Kovalev, Lanyi, Lee, Lister, Lister, Lovell, Lähteenmäki, Ma, Mattox, Mirabal, Mirabal, Ojha, Petrov, Petrov, Petrov, Petrov, Pollack, Sowards-Emmerd, Sowards-Emmerd, Y. Y. Kovalev   +33 more
core   +1 more source

The catalogue of positions of optically bright extragalactic radio sources OBRS-1

, 2011
It is expected that the European Space Agency mission Gaia will make possible to determine coordinates in the optical domain of more than 500000 quasars.
Beasley, Charlot, Condon, Fomalont, Helmboldt, Kovalev, L. Petrov, Lanyi, Lindegren, Ma, Matveenko, Mignard, Petrov, Petrov, Petrov, Petrov, Petrov, Piner, Pushkarev, Taylor, Zacharias   +20 more
core   +1 more source

Odd Radio Circles Modeled by Shock-bubble Interactions

The Astrophysical Journal
The physical nature and origins of the newly discovered class of Odd Radio Circles (ORCs) remain unclear. We investigate a model whereby ORCs are synchrotron-emitting vortex rings formed by the Richtmyer–Meshkov instability (RMI) when a shock interacts ...
Yiting Wang, Sebastian Heinz
doaj   +1 more source