Results 31 to 40 of about 544 (185)

Depolarization of Extragalactic Radio Sources [PDF]

Symposium - International Astronomical Union, 1982
In the last decade correlations of the depolarization parameter λd with several parameters, i.e., the radio luminosity L, redshift z, and source size D have been investigated by several authors, where λd is the wavelength at which the percentage polarization drops to its half maximum. Kronberg ET AL.
M. Inoue, H. Tabara
openaire   +1 more source

A galactic microquasar mimicking winged radio galaxies

Nature Communications, 2017
Winged radio galaxies possess wing features detectable at radio wavelengths, yet the physical interpretation of such extragalactic radio sources remains elusive.
Josep Martí, Pedro L. Luque-Escamilla, Valentí Bosch-Ramon, Josep M. Paredes   +3 more
doaj   +1 more source

An Old Fogey’s History of Radio Jets

Galaxies, 2017
This paper describes a personal view of the discovery of radio jets in celestial radio sources. The existence of narrow, collimated optical features in distant objects has been known about since the early 20th century; however, the advent of radio ...
Ralph Spencer
doaj   +1 more source

DEFROST: Detecting Excess in Faraday Rotation thrOugh Sophisticated analysis Techniques

Astronomy & Astrophysics
Aims. Understanding the origin and evolution of cosmological magnetic fields requires a detailed knowledge of the strength of magnetic fields in different extragalactic environments.
Vacca Valentina, Hutschenreuter Sebastian, Cabriolu Andrea, Enßlin Torsten A., Roth Jakob, Reineke Martin, Frank Philipp, Govoni Federica, Murgia Matteo, Fenu Gianni   +9 more
doaj   +1 more source

Multifrequency Studies of Active Galactic Nuclei in the Planck Satellite Era

Galaxies, 2016
The multi-epoch single-survey Planck satellite data have given a rare glimpse into how the radio spectra of active galactic nuclei (AGN) evolve in time.
Anne Lähteenmäki, the Planck Collaboration   +1 more
doaj   +1 more source

Powerful Radio Sources in the Southern Sky. III. First Results of the Optical Spectroscopic Campaign

The Astrophysical Journal Supplement Series
We recently built the G4Jy-3CRE catalog of extragalactic radio sources. This catalog lists 264 powerful radio sources selected with similar criteria to those of the revised Third Cambridge Catalog, but visible from the Southern Hemisphere.
A. García-Pérez, H. A. Peña-Herazo, A. Jimenez-Gallardo, V. Chavushyan, F. Massaro, S. V. White, A. Capetti, B. Balmaverde, W. R. Forman, C. C. Cheung, J. P. Madrid, C. Mazzucchelli, N. P. H. Nesvadba, I. Andruchow, S. Cellone, R. Grossová, A. Paggi, E. Sani, V. Reynaldi, R. P. Kraft, C. Leto   +20 more
doaj   +1 more source

Modelling the Multifrequency SED of AGN Candidates among the Unidentied EGRET and Fermi Gamma-Ray Sources

Acta Polytechnica CTU Proceedings, 2014
Of the 271 sources in the 3rd EGRET catalogue, 131 were reported as unidentied, i.e. not associated with any particular class of point source in the sky.
Pieter J. Meintjes, Pheneas Nkundabakura, Brian van Soelen, Alida Odendaal   +3 more
doaj   +1 more source

The Evolution of Extragalactic Radio Sources [PDF]

Symposium - International Astronomical Union, 1996
A series of VLBI surveys of complete samples of radio sources selected at 5 GHz (Pearson & Readhead 1988, hereafter PR; Xu et al. 1995 and references therein) has revealed that ≃ 10% of the objects are “Compact Symmetric Objects” (CSOs), in which high-luminosity radio emission regions are seen on both sides of the center of activity on scales less ...
A. C. S. Readhead, T. J. Pearson, G. B. Taylor, P. N. Wilkinson   +3 more
openaire   +1 more source

A Possible Solution to the Mystery of the ANITA Anomalous Events

Annalen der Physik, Volume 538, Issue 4, April 2026.
In 2006 and 2014, the Antarctic Impulsive Transient Antenna (ANITA), a balloon‐borne radio observatory flying over Antarctica, detected two strange upward‐going radio pulse events that have not yet been explained by our current understanding of physics.
Massimo Villata
wiley   +1 more source

The Chinese Radio Telescope Array for Interplanetary Scintillation Monitoring

Space Weather, Volume 24, Issue 1, January 2026.
Abstract Solar flares, coronal mass ejections (CMEs) and enegertic particles, etc., are the driving sources that may cause catastrophic space weathers. It is desirable to obtain information of solar eruptions like flares and CMEs, etc., propagating from the Sun to the near‐Earth space.
Yihua Yan, Wei Wang, Jin Fan, Ming Xiong, Zhijun Chen, Linjie Chen, Cang Su, Sha Li, Jun Cheng, Jing Du, Xueshang Feng   +10 more
wiley   +1 more source