Results 51 to 60 of about 101,827 (259)
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
Long-term variability of extragalactic radio sources in the Planck Early Release Compact Source Catalogue [PDF]
, 2013 Combining measurements taken using the Wilkinson Microwave Anisotropy Probe(WMAP) from 2001 to 2008 with measurements taken using Planck from 2009 to 2010, we investigate the long-term flux density v ariability of extragalactic radio sources selected ...
Xun Chen +7 more
semanticscholar +1 more source
Binary black holes in nuclei of extragalactic radio sources [PDF]
, 2013 If we assume that nuclei of extragalactic radio sources contain binary black hole systems, the two black holes can eject VLBI components, in which case two families of di erent VLBI trajectories will be observed. Another important consequence of a binary
J. Roland +5 more
semanticscholar +1 more source
The Galactic Halo Contribution to the Dispersion Measure of Extragalactic Fast Radio Bursts [PDF]
Astrophysical Journal, 2019 A new model of the Milky Way (MW) halo component of the dispersion measure (DM) for extragalactic sources, such as fast radio bursts, is presented in light of recent diffuse X-ray observations. In addition to the spherical component of isothermal gas (kT
S. Yamasaki, T. Totani
semanticscholar +1 more source
DEFROST: Detecting Excess in Faraday Rotation thrOugh Sophisticated analysis Techniques
Astronomy & AstrophysicsAims. 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 +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 +1 more
doaj +1 more source
Studies of Compact Extragalactic Radio Sources [PDF]
, 1981 Three studies of compact, extragalactic radio sources are presented. In the first, VLBI maps are presented of the nuclear cores of four radio galaxies which have large symmetric radio lobes: 3C 111, 3C 390.3, Cyg A, and 0055+30. Each source contains a
Linfield, Roger Paul
core +1 more source
VLBI observations of 21 extragalactic radio sources
, 1999 We present the results of VLBI observations of 21 extragalactic radio sources carried out with an ad-hoc VLBI array including Shanghai, Urumqi, Noto, and Hartebeesthoek radio telescopes. Eleven sources are imaged, three of them for the first time with
D. R. Jiang +7 more
core +2 more 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 +3 more
doaj +1 more source
The impact of polarized extragalactic radio sources on the detection of CMB anisotropies in polarization [PDF]
, 2012 Recent polarimetric surveys of extragalactic radio sources (ERS) at frequencies ν≳1 GHz are reviewed. By exploiting all the most relevant data we study the frequency dependence of polarization properties of ERS between 1.4 and 86 GHz.
M. Tucci, L. Toffolatti
semanticscholar +1 more source