Results 101 to 110 of about 101,827 (259)

Changing-Look AGNs or Short-Lived Radio Sources?

Frontiers in Astronomy and Space Sciences, 2017
The evolution of extragalactic radio sources has been a fundamental problem in the study of active galactic nuclei for many years. A standard evolutionary model has been created based on observations of a wide range of radio sources.
Aleksandra Wołowska, Magdalena Kunert-Bajraszewska, Kunal Mooley, Gregg Hallinan   +3 more
doaj   +1 more source

Counts of Extragalactic Radio Sources [PDF]

Australian Journal of Physics, 1961
In this paper a formula is derived giving the cumulative totals of class II radio sources, to successive limits of flux density, when changes in the space· density and in the radiative properties of these sources are taken into account.
openaire   +1 more source

Unbiased studies of diffuse extragalactic radio sources [PDF]

Astronomische Nachrichten, 2006
AbstractWe present an overview of unbiased studies of diffuse extragalactic radio sources. We use a previously developed filtering technique to remove compact sources from large surveys such as WENSS, WISH, and NVSS and examine the residual diffuse emission.
Rudnick, Lawrence, Delain, Kisha M., Lemmerman, Jeffrey A.   +2 more
openaire   +2 more sources

Powerful Radio Sources in the Southern Sky. II. A Swift X-Ray Perspective

The Astrophysical Journal Supplement Series, 2023
We recently constructed the G4Jy-3CRE, a catalog of extragalactic radio sources based on the GLEAM 4-Jy (G4Jy) sample, with the aim of increasing the number of powerful radio galaxies and quasars with similar selection criteria to those of the revised ...
F. Massaro, S. V. White, A. Paggi, A. Jimenez-Gallardo, J. P. Madrid, C. Mazzucchelli, W. R. Forman, A. Capetti, C. Leto, A. García-Pérez, C. C. Cheung, V. Chavushyan, N. P. H. Nesvadba, I. Andruchow, H. A. Peña-Herazo, E. Sani, R. Grossová, V. Reynaldi, R. P. Kraft, B. Balmaverde, S. Cellone   +20 more
doaj   +1 more source

The CHILES Continuum and Polarization Survey. I. Survey Design and Noise Characterization

The Astronomical Journal
We introduce and describe the CHILES Continuum and Polarisation (CHILES Con Pol) Survey, a 1000 hr 1.4 GHz wideband full polarization radio continuum deepfield with the Very Large Array, commensurate with the CHILES H i deepfield.
Nicholas M. Luber, Min S. Yun, Hansung B. Gim, Daniel Krista-Kelsey, D.J. Pisano, Emmanuel Momjian, Chris Hales   +6 more
doaj   +1 more source

The extragalactic radio-source population at 95 GHz [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
Replaced with final version (MNRAS, in press), 15 pages plus two landscape data ...
Sadler, E., Ricci, R., Ekers, Ronald, Sault, R., Jackson, Carole, De Zotti, G.   +5 more
openaire   +3 more sources

Physics from Time Variability of the VHE Blazar PKS 2155-304 [PDF]

, 2010
Blazars are the principal extragalactic sources of very high energy gamma-ray emission in the Universe. These objects constitute a sub-class of Active Galactic Nuclei whose emission is dominated by Doppler boosted non-thermal radiation from plasma ...
BARRES-DE-ALMEIDA, ULISSES
core  

The CHILES Continuum and Polarization Survey. II. Radio Continuum Source Catalog and Radio Properties

The Astronomical Journal
The COSMOS H I Large Extragalactic Survey (CHILES) Continuum and Polarization survey is an ultradeep continuum imaging study of the COSMOS field conducted using the Karl G. Jansky Very Large Array.
Hansung B. Gim, Min S. Yun, Nicholas M. Luber, Emmanuel Momjian, D. J. Pisano, Kelley M. Hess, Julia Blue Bird, Lucas Hunt   +7 more
doaj   +1 more source

Extragalactic variable radio sources

The Astrophysical Journal, 1985
Radio emission from a plasmoid that expands in a nonspherically symmetric manner is analyzed. The properties of this model are compared with the results of Andrews et al. (1978) and Epstein et al. (1982) concerning the values of beta derived for standard (delayed) radio sources.
openaire   +1 more source

The evolution of radio galaxies

, 2010
Radio galaxies with extended lobes are believed to interact strongly with their environment. In this thesis, I investigate the evolution of radio galaxies with different properties and track them through the cosmological ages.In Chapters 2 and 3, I ...
Wang, Yang
core